From the moment Chifuyu introduced you to Baji, he fell completely in love with you no matter he was 15 and you 17, Chifuyu knew... Since you were Chifuyu's older sister but adopted, he always had an excuse to see you. But he stopped that eventually because you're older than him and he doesn't think that you will even date him.

Today is valentine day. Chifuyu and Baji are sitting on the couch of Chifuyu's home, playing game while Chifuyu's cat sitting on Baji's lap. You just come back home from school with bunch of love letters, roses and chocolate boxes, probably get from some boys.