Hayashida-sensei freaking out over the fact that Rei, a high-schooler, makes a higher salary than him.
Kawamoto's household catches Rei buying instant noodle in supermarket during Chapter 4. Cue Akari digging at Rei for liking cheap stuff over their handmade food.
Hina's bento. Perhaps it's for the best that Takahashi didn't get to taste the meal. Even the cats died.
Just about every time Nikaidou, the walking Large Ham, shows up.
Something needs to be said about Nikaidou barging into Kiriyama's room at 9 AM in Chapter 8, just because he wants to train with him. The normally stoic Kiriyama gets a bit annoyed this time.
Momo sees Nikaidou as a Bodoro (a TotoroExpy) and jumped onto him. Nikaidou immediately gets into 'kindly gentle adult' mode, leaving Rei in dust...
Rei's entire match against Matsunaga in episode 9. All of it. You know it's funny when a serious flashback Rei has involving Kyouko in it gets used comedically before Rei decides to go ahead and swiftly beat the old guy in the game they were having because Rei thought it was way too painful and awkward for him to continue playing against him, noting internally that it would be difficult to lose on purpose even if he wanted to!
Rei's Spit Take after he sees Nikaidou on TV. There's also Hina and Momo's reactions to seeing Rei on TV, just seconds after Rei tried to slowly slip away after realizing that he's in that broadcast too.
And then there's Rei's uncharacteristic rant against Nikaidou after the latter started grilling on his playstyle in his commentary during Rei's broadcasted match.
A chapter after that, we have Rei's jealousy at Nikaidou for being a better shogi teacher to Hina and Momo after Nikaidou gives out this beginners-friendly how to play shogi book meant for kids to the sisters. There's also Rei's reaction when he realizes that Nikaidou was the one who wrote, illustrated, and published the book.
Everything about the After School Burners Club in Chapter 32 (Episode 16 in the anime). They immediately call Rei a nice guy after he accidentally bumped into chemicals on the table and created a new scent for their soap. Their leader is a first year student who has a mustache.
Kyouko referring to Akari as an "old woman" before correcting herself at the last minute following her chance meeting with the Kawamoto sisters earlier that day and asking Rei about them once they got home.
In the same scene, thinking Rei has a thing for one of the sisters, Kyouko, for one reason or another, brings up Momo, and, seemingly appalled at the thought, begins to label Rei as a pervert!
And before all this, Kyouko eating almost all of the bento Hina and her sisters made for Rei and making nitty-gritty comments about the food with each bite she takes.
After the first day of Shimada's workshop, Rei and Nikaidou continue to bicker about their Shogi moves all the way home without stopping... until they saw a bird nearby dived under the river and never came back up, upon which they dartedto nearest bookstore to find out if it's dying.
During the matches in Kyoto, Rei is commentating with a very energetic A-Class veteran and is so overwhelmed that he thinks if Shimada had to play with people like that day by day for years and only got stomachaches because of the nerves, it makes Shimada a monster in his own way because the pressure is just too much for Rei.
Hina and Akari's mortified expressions when Momo suggested using gum as a filling for a new sweet their grandfather wanted to make. On the other hand, while those two were less than satisfied at the suggestion, Someji reacts with proud Manly Tears at Momo.
Akari's imagine spot of laser-firing grandpa-zilla being unleashed on parents of the bullies that picked on Hina in Episode 29.
After a match against Subaru Hachiya, a very noisy player, Smith and the Club's chairman who were playing next to Kiriyama scolded him for not bagging the damn guy sooner and went for the move that made Hachiya even more pissed, as if it can easily be done.
This from Episode 29 end card screen in the anime, after Hachiya dragged Kiriyama to a post-match review in a family restaurant.
Hachiya: "Kiriyama, you're not thinking of going home soon aren't you?"
Kiriyama: "Excuse me! One more parfait!"
Hayashida-sensei in Chapter 60 threatening to go ham on Hina's homeroom teacher who subject Hina to victim-blaming after hearing updates of the story. It's Kiriyama that has to stop him this time.
And after that he congratulates Kiriyama on winning his match a few seconds too late.
Before all that, Junkei's entrance. The way the anime presents it makes him look like some big brooding nemesis with the face blackened over.
Two Shogi Hall masters putting Kiriyama on a spot fighting a commemorative match against Souya. All because since Shimada won against Pretty Boy Gakuto, upcoming Shogi Maestro Tournament will be just two old men competing and that won't look good on camera..
Yanagihara reminding the cast and us audience that Shimada and Souya are of the same age.
Yanagihara: What the hell happened in Shimada's life?
Gakuto's "mountain therapy" - that Shimada won't fall for because he had enough fill being forced to climb mountains bare-handed collecting bamboo shoots and vegetables in his childhood.
Smith: That's Shimada, 8-Dan for you! A natural-born mountain climber! So cool! A man with a heart that not even therapist can access!
Shogi-Science School Club is saved from seniors retiring issue because the missing members is soon filled in by the school's principal and vice principal. In-fact, the VP has been sending requests to join but Hayashida-sensei kept putting it off, afraid of bothering Kiriyama.
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