Kotomi has been friends with Yuu since middle school. She's got that classic "glasses girl" aesthetic and loves anime—basically she and Tomoko should get along, right? Except they really don't. Despite sharing interests, there's just something that doesn't click between them.
Things get awkward when they both end up at the same high school. Tomoko apparently has zero memory of Kotomi from back in the day, which only feeds into Kotomi's resentment. For Kotomi, it's probably salt in the wound—like, how do you forget someone who remembers you?
Content compiled by AnimeList.moe from publicly available sources.