Responses
I think it's just sort of a symbol that Iga doesn't really love him. You know, the usual romantic thing to do is first wake up the other and make sure he's okay. But the fact that he woke up alone makes him seem lonely. I guess.
I'm not sure to understand this part : http://www.mangago.me/read-manga/iberiko_buta_to_koi_to_tsubaki/tr/v01/c004/pg-14/
is it because he wake up alone the next morning and the other is playing around?? or.. well I'm not sure at all :p