I just feel bad for her. This dumbass kid is not worth the effort anyway
Dunno man, Chihiro is acting childish but his determination and sense of justice is pretty good.
He has shown a lot of times to Ranko he is willing to even die for Rea sake, got punctured all the way through with a sword, Rea bit him in the neck and mowed his arm, still willing to commit.
Meanwhile he saved her from a dog once long time ago and he doesn't really remember the whole incident, while she is cling to that memory as if was yesterday.
Sure they spent time together as friends, watching movies and whatnot but even though her mother is ready marriage that's surprisingly legal in Japan and for baby making too (JFC) he holds no romantic feelings for her whatsoever. Textbook example of unrequited love.
Can't really feel sorry for Ranko, should already notice he isn't interested, throwing herself and kissing knowing well he interested in someone else is stupid.