You two are blowing it out of proportion. Sure, he's relieved to find out his close friend isn't the one in the coma, and while it looks like he doesn't care about Sachiko, at the same time, consider this:
Sentaro allowed her to be on the bike, and he got out of the accident unscathed. Don't you think he feels guilty as hell? With the rest of the family too worried about Sachiko, who else would be able to provide a little comfort and sympathy to Sentaro for allowing her to get involved in the first place, while he walks away with only a few scratches?

Someone has to allow Sentaro a chance to let some of it out. Better that it isn't family, who would be too busy putting all their hopes on Sachiko's recovery. That's what real friends are for.

He ran away because the ONE time he relented and let her ride the bike with him, she got seriously wounded. Who wouldn't want to run away?


The forced drama aside, I knew from the start there was a reason they had cast Nanri Yuuka as Ritsuko. She left VA work to devote herself to singing years ago. It takes someone talented to pretend that they suck for a short time. As well as her voice seems to fit the gentle nature of Ritsuko, there was no way they weren't going to have her sing.