Alright then! You are right about there being more to the comic.
Well the characters are: Diva (Girl with curly blond-brown hair) Starr (Boy who is Shirtless) And Kin (Boy with long pink hair)
Apparently, Starr and Kin were 'best friends' According to Kin anyway. Kin was Starr's crush, Kin kind of saved him and always took care of him. But then due to something, Kin died, (I think someone needs to tell me this part... I forgot... ) And though it was tragic, Starr told himself he needed to move on. So he did, or at least tried, and is living with his friends.
Third reasons of why I think Starr is imagining Kin is :
1.) Starr must've really had a HUGE crush or loved Kin so much, he's starting to be seeing things
2.) He must be comparing Diva with Kin, considered on how much they act alike
3.) ...He might like Diva, but maybe his first experience with Kin keeps reminding him that maybe it'll turn out the same way
...Gosh.. I hope I'm not offending anyone with this paragraph.