- Somewhat played with in 11eyes, specifically in the "Before Story" chapter of the Gaiden Game -Resona Forma-, which features the brother and sister Benedictus and Scholastica. They didn't actually have sex together, nor they actually have feelings for each other beyond being brother and sister - Benedictus was merely forced into a Mind Rape illusion where he sees his own body forcing Scholastica into having sex with him. There may be some shades of Incest Subtext beforehand but nothing explicit or confirmed.
- Elis and Hiroki in Canvas 2, though of course she's actually his cousin.
- Danganronpa V3: Killing Harmony: Korekiyo Shinguji is revealed to have had this kind of relationship with his deceased older sister, whom he believes is now a ghost inhabiting his body. He's also revealed to be a Serial Killer aiming to murder 100 women so his sister can have plenty of friends in the afterlife, which is why he kills Angie Yonaga and Tenko Chabishira in Chapter 3.
- The main romantic path of Double Homework is with the protagonist’s sisters, Johanna and Tamara. The player doesn’t even have to choose between the two of them.
- There's a rather interesting example in DRAMAtical Murder between Aoba and his twin brother, Sei. Or rather, between Aoba and one of his split consciousnesses that's been implanted into Sei's body. It's complicated.
- In The Fruit of Grisaia we find out that Yuuji's older sister Kazuki more or less molested him before she died, though he didn't mind since he nearly worshipped her. In The Eden of Grisaia it seems she really does love him, to which he responds neutrally at best. They do have sex at least once, though, since Kazuki wants it and isn't as dead as previously claimed.
- Taka and his sister Kana from Kana: Little Sister become attracted to each other more and more as time progresses. She is also terminally ill, so the makers have enough material for a lot of melodrama. And boy, do they deliver — no punches pulled here!note
- All over the place in Kara no Shoujo. The one place you don't find it is with Reiji's little sister Yukari. If you want a sex scene with her, you're going to have to settle for an early picture of her in the middle of getting changed.
- In the bishoujo game Ko-ko-ro..., the protagonist, Souji, has had sex with both of his sisters and, during the game's timeline, is still having sex with his younger sister, Asuka.
- Lamune has a romantic path for Suzuka, the one-year-younger sister of male lead Kenji. The anime adaptation portrays their relationship as a non-romantic sibling relationship, since it follows Nanami's route, though the trope gets poked fun at once when Hikari teases Suzuka about being jealous of Nanami.
- The "terrible family secret" on the checklist in Long Live the Queen refers to Kevan, the Earl of Io sleeping with his full-sister Corisande, the Duchess of Mead. And this is only the last step in a long sequence of just how screwed up that family is.
- A visual novel known as Mother Daughter has the protagonist's mother and sister depend on him after his father dies... so he has sex with them. His sister and his mother. And the girl next door. And her mother.
- Yui from Muv-Luv Alternative: Total Eclipse is in love with Yuuya however even after learning he's really her half-brother, while shocked and devastated, she still seems to carry a torch for him.
- The visual novels by 0verflow have this all over the place. Tomaru Sawagoe may have one of the most tangled family trees in all of fiction, having had children with his half-sisters, his aunts, his daughters. And his sons have followed his example by doing it with their half-sisters, and those sons includes, possibly Makoto from the School Days games.
- Though as an ero-game it's par for the course, Princess Waltz takes this to an almost absurd degree. Arata and Chris are not only half-siblings (same father), they are cousins (their mothers are sisters), and second cousins (their father and respective mothers are also cousins). However, the game very pointedly refrains from mentioning that they are, in fact, related quite closely. Instead, the typical not blood related version of this goes to Shizuka and Arata.
- That sounds a lot like the plot of Vladimir Nabokov's Ada, or Ardor...
- This is played around with in Starstruck Love. The Heroine is taken in by her neighbor and a friend of the family. Three of the love interests are her adoptive older brothers and, depending on the route, two of them at max will develop feelings for her. What she doesn't realize is that her brothers really love her.
- Suika: Technically, they aren't blood related, but Yoshikazu feels this way about Akane causing him some major angst. The reason is that he feels she is genuinely his little sister, which disturbs him greatly.
- Occurs during a bad ending in Swan Song, although you won't know this unless you get the Good ending.
- Tsukihime's Akiha Tohno is strongly implied to have the hots for her brother Shiki, although the reverse doesn't seem to be true... except in Akiha's route where they DO get it on. Possibly averted, as well: Even though they're Not Blood Siblings, and both of them are aware of this (Akiha all along, Shiki much later), they continue to treat each other as such. Not helped by the fact that the actual SHIKI Tohno also has a twisted love for Akiha.
- Shiki comes to love whichever heroine's route he is in and does not love whichever heroine's route he is NOT in. That being said, saying that he does not return her feelings is as untrue as it is for any other heroine, since all of them have feelings for him regardless of which route he is in. Akiha also doesn't push on it until Shiki starts pushing back.
http://tvtropes.org/pmwiki/pmwiki.php/BrotherSisterIncest/VisualNovels
FollowingBrother Sister Incest / Visual Novels
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