History Literature / OnlySenseOnline

* GamingStatTropes: The stats in ''OSO'' are:
** [[HitPoints HP]]
** [[{{Mana}} MP]]
** [[{{Strength}} ATK]] for physical attack
** [[{{Constitution}} DEF]] for physical defence
** [[{{Intelligence}} INT]] for magic attack
** [[{{Wisdom}} MIND]] for magic defence
** SPEED for influencing speed
** [[{{Dexterity}} DEX]] for weapon and production skill correction
** [[LuckStat LUK]] for increase in drop rates and critical hit chances

* PlayerArchetypes: Many of the characters of the series can be a [[MixedArchetypes combination of archetypes]] but leaning more to one side than another.

* AmazonBrigade: Myu's usual in-game party is composed of six (including her) GamerChicks of similar ages. All of its members have different specializations, which complement each other very well, and their excellent teamwork makes them a fearsome force in-game.

* LighterAndSofter: Compared to the likes of ''LightNovel/SwordArtOnline'' or ''VideoGame/DotHack'' or any series that has [[TheGameComeToLife the games becoming reality for the characters]], this series is very lighthearted and just follows the normal everyday gaming life of a guy.

* YouGottaHaveBlueHair: Many ''OSO'' players opt to give their [[DigitalAvatar player avatars]] fantastic hair colors, such as Myu's white hair, and Sei's light blue hair. It makes Yun and Lucato stand out more for having realistic black hair.

* AcquiredPoisonImmunity: Some players deliberately take Bad Statuses to level their Resistance Senses. In "Forest Camping Game" event, a lot of players ends up accidentally level up poison resistance due to them not having the skills to identify and prepare poisoned food and resorting to eating everything they can find. It's proven to be traumatic to quite a number of players due to how bad the poisoned food tastes.

* BrotherSisterIncest: One nearly happens by accident in the beginning of Volume 3: after Yun and Myu got hit by Charmed status effect while testing out potions, Myu suddenly pushes Yun down and seems like she's going to have her way with her brother (or rather her sister in-game) until Magi walks into them.

* CoolButInefficient: The most favorable opinion most people have for archery: sure, it looks neat, but it has serious problems, from poor range and accuracy to arrows being consumable items. [[AvertedTrope It turns out that]] archery, like other combat Senses, works best when paired with Senses that make up for its limitations, but nobody in the closed beta had figured out what the best support Senses ''were''. Meanwhile, consumables are essential for everyone and so the cost of arrows turns inconsequential next to, say, the MP potions mages eventually need to keep going. After the first book Yun's arrow worries disappear since it's just one (very small) part of prepping for combat. Running out of ammo is an everpresent issue, however, which is why Yun eventually picks up knives as secondary weapons.

* BrotherSisterIncest: One nearly happens by accident in the beginning of Volume 3: after Yun and Myu got hit by Charmed status effect while testing out potions, Myu suddenly pushes Yun down and seems like she's going to have her way with her brother (or rather sister in-game) until Magi walked in.

* MoneySink: The game is full of them, ranging from the constant need for [[BreakableWeapons equipment repairs]], [[AnEntrepreneurIsYou rental costs for shops and homes]], membership fees for various services such as libraries, and hefty expenses for founding and running a player guild. Yun is incredibly susceptible to these, as he's constantly blowing piles of cash on land, shop improvements, armor repairs, and new tools.

* PotionBrewingMechanic: Thanks to ''OSO'''s elaborate ItemCrafting system, potion-making is a very intricate process, and it is actually possible to greatly enhance the efficacy of a potion by performing a whole series of intermediate steps, such as drying the potion ingredients before mixing them.

* MundaneUtility: As he becomes more used to the game, Yun finds out that he can make use of ''OSO'''s VirtualReality and practice his real life baking skills without spending actual money on baking ingredients. Some other players also use the game for simulation of real-life activities, such as mountain climbing.

* AcquiredPoisonImmunity: Some players deliberately take Bad Statuses to level their Resistance Senses.

* CoolButInefficient: The most favorable opinion most people have for archery: sure, it looks neat, but it has serious problems, from poor range and accuracy to arrows being consumable items. [[AvertedTrope It turns out that]] archery, like other combat Senses, works best when paired with Senses that make up for its limitations, but nobody in the closed beta had figured out what the best support Senses ''were''. Meanwhile, consumables are essential for everyone and so the cost of arrows turns inconsequential next to, say, the MP potions mages eventually need to keep going. After the first book Yun's arrow worries disappear since it's just one (very small) part of prepping for combat.

* ShipTease: The author enjoys placing Taku and Yun in compromising positions, and the latter's [[HeIsNotMyBoyfriend vehement denials of any special relationship between the both of them]] only entrenched the impressions of onlookers that "she" is acting like a {{Tsundere}}.

* AttractiveBentGender: Thanks to the automatic body correction applied to him after the system misidentified him as female, Yun appears in-game as a long-haired beauty.

* ComplacentGamingSyndrome: InUniverse, this created the harsh tiering of Senses that left many considered "trash." The majority of players treated ''OSO'' as any other MMO, devoting themselves to the combat grind while ignoring numerous (poorly-documented) subsystems that didn't have an immediate benefit. Even crafters mostly settled for making equipment and letting NPC vendors handle consumables. Then the [=GMs=] shook things up with a number of formal and informal events designed to force the player base out of its complacency - letting NPC vendors sell out, instituting a hunger/satiety system that suddenly made the "useless" Cooking Sense essential, the Forest Camping Game which demanded low-tier Senses to prosper, and so on.

* MundaneUtility: As he becomes more used to the game, Yun finds out that he can make use of ''OSO'''s VirtualReality and practice his real life baking skills without spending actual money on baking ingredients.

*** When Myu's party addressed the [=MPKer=] that was trying to kill them in volume 1 as "Train Man", Yun wondered whether he had anything to do with [[Franchise/TrainMan a certain unique romance novel]].

* CrossPlayer: [[invoked]] Although this option is not available by default in ''OSO'', Yun becomes one thanks to a system misidentification by the game. His real life acquaintances treat this as a case of GoodBadBug, much to his chagrin.

During the official launch of ''Only Sense Online'', Shun, an OrdinaryHighSchoolStudent, is compelled by his best friend Takumi and younger sister Miu, both hardcore gamers and beta testers of ''OSO'', to join them in the game. HilarityEnsues, when the game system mistakes his sex and generates a [[GenderBender female avatar]] for him, which he further complicates by accidentally giving himself a feminine-sounding handle "Yun". As a complete novice player, Yun picks up a set of unpopular Senses which his much more experienced companions label as trash. Undeterred by their harsh words, Yun decides to keep his Senses and experiment with them, embarking him on a journey where he would explore the richly-designed game world, meet new friends, face challenges and actually thrives in-game… all alongside with him [[RunningGag constantly trying (and failing)]] [[CassandraTruth to convince other players that he is not a girl!]]

--->I've had enough money. I've still had some left over after buying a portable furnace. ——800G
--->I've had enough money. Again I've still had left over after buying a higher level polishing kit. ——1500G
--->I've had enough money. Once again I've still had left over after buying a higher level Synthesis kit. ——1500G
--->I've had enough money. So I bought ten sets of Iron Arrows. ——300G
--->The result, what remained was——630G
--->What I obtained with it is priceless. No wait!! I splurged too much. I'm broke again. It means I need to craft again.

* MagikarpPower: All of the skills Yun picks turns out to be quite useful; they just need a lot of time and effort to level up, which he does. For example, Yun's Hawk Eyes Sense is [[WhatKindOfLamePowerIsHeartAnyway widely derided]] in ''OSO'' because its immediate effects - extended vision and night vision - are easily substituted with other more useful Senses[[note]]Bearers of the Light Element Talent Sense for example can just simply illuminate a dark area[[/note]]. However, Yun quickly discovers, with some insight from Taku, that Hawk Eyes is in fact a targeting Sense, and allows its user to cast spells as far as the range of the extended vision it provides. After it reaches level 50, it can be upgraded into Sky Eyes, which enhances its effects even more and also provides new effects, including the ability to ''perceive enemy attacks in BulletTime''.

* MagikarpPower: All of the skills Yun picks turns out to be quite useful; it just needs a lot of time and effort to level it up which he does. For example, Yun's Hawk Eyes Sense is [[WhatKindOfLamePowerIsHeartAnyway widely derided]] in ''OSO'' because its immediate effects - extended vision and night vision - are easily substituted with other more useful Senses[[note]]Bearers of the Light Element Talent Sense for example can just simply illuminate a dark area[[/note]]. However, Yun quickly discovered (with some insight from Taku) that Hawk Eyes is in fact a targeting Sense, and allows its user to cast spells as far as the range of the extended vision it provides. And after it reaches level 50, it can be upgraded into Sky Eyes, which enhances its effects even more, and also provides new effects, including the ability to ''perceive enemy attacks in BulletTime''.

* NonstandardSkillLearning: Normally one learns a new Skill or Art when certain Senses reach a certain level but there are others that have some hidden requirements.

* TheDevTeamThinksOfEverything: As the game goes on, it becomes increasingly clear that there are no truly trash Senses, with content, useful abilities, and helpful shortcuts hidden behind everything. It's mind-boggling how much the developers made that probably nobody has seen yet because it's gated behind something "useless."

* BiggerOnTheInside: All guild halls featured in ''OSO'' (【Crafting Guild】 and 【Eight Million Gods】) so far are noted to be bigger on the inside,

** Ingredients Knowledge is learned when 【Cooking】 is level 10 or higher and when one subjugates 100 enemies with Cooking-type equipment.

* ShoutOut: When Myu's party addressed the [=MPKer=] that was trying to kill them in volume 1 as "Train Man", Yun wondered whether he had anything to do with [[Franchise/TrainMan a certain unique romance novel]].

* MarilynManeuver: In volume 5 when Yun was forced to help the Crafting Guild to host the [=PvP=] Tournament while cosplaying as a nun, an ill-timed draft generated by the opening ceremony's special effects lifted his skirt up, much to his absolute embarrassment.