Dang, that poor guy must be really sick if he's interned in a hospital the enough time to make a nurse to fall in love with him.
In an early page it said he couldn't use either of his arms, so he could have been in an accident bad enough to require an extended stay for recuperation and rehabilitation.
I'm sorry, I better not.Eh? You don't want to go!?...Ah...I, I am free that day, but...That patient, huh.A... mixer?Yeah, I'm going to a concert so I can't make it.Hey, do you want to go to a mixer this weekend?Kitano-san, you said you had an interest in it before, right?