I'd like to say Morinaga shouldn't worry about Senpai not missing him considering how he cried when Morinaga went missing, but that was cuz he didn't know where he was. So I guess, he really does mean it. Morinaga should have just come up with some weird excuse about having to take care of a friend who is like family to him. Not really a lie, since apparently Senpai does suck at taking care of himself.
I'd like to say Morinaga shouldn't worry about Senpai not missing him considering how he cried when Morinaga went missing, but that was cuz he didn't know where he was. So I guess, he really does mean it. Morinaga should have just come up with some weird excuse about having to take care of a friend who is like family to him. Not really a lie, since apparently Senpai does suck at taking care of himself.