さとりに告白したけど嫌われるのに慣れ過ぎて遊びだと思い込んでるダウナーお姉ちゃん
こういうお姉ちゃんを幸せにしてあげたい…

Downer onee-chan Satori is confessed to, but is used to being hated so is convinced it's some kind of game.
I want to make such a girl happy...