Well, there it is. The finishing blow has come for Chika now that Shintaro and Koto started dating. She got properly rejected too.
Welcome to the losing heroine's club girl, here's your official member card.
Chika really has guts to come back the next day like nothing happened. She's made of tougher stuff than the other two losing heroines who lost without putting up a fight. Remon lost to inaction while Anna was even assisting her rival. Both were too cowardly to fight for their love, but heym even Chika who did something lost her fight.
I guess we're not getting a love triangle #4 to observe, but a rumors and misunderstandings arc next.