Tokyo Revengers: Chifuyu's Sister

Of all the children in his extended family, Matsuno Chifuyu liked his cousin, Tsukamoto Serina, the least. She was two years older than him. On the surface, the clever and well-behaved Tsukamoto Serina was the family's favorite, but only Chifuyu knew about the terrible relationships hidden beneath her pretty face.

Recently, he'd discovered something that sent a chill down his spine. Several Toman captains who'd been dating online had all gotten dumped around the same time. And the one who'd broken up with every single one of them was the same person: his cousin, Tsukamoto Serina!

Remembering how he'd held a grudge against Serina for dumping Baji, he summoned up his courage and loudly accused her: "Serina, you're a scumbag for playing with people's feelings!" If that one sentence had caused the captains' morale to plummet on the eve of the decisive battle, leading to their defeat, then Matsuno Chifuyu would never forgive himself for the rest of his life!

Theme: Hard work and perseverance