ハル

Age: 22? (Birthday: ???)

The young man without a name who protected Inui, sótano’s owner, from getting hit by a car. Also, the story’s protagonist. 

He appears to have amnesia, but the doctors believe it’s only a temporary side effect of the accident. He’s carefree to a fault and overly touchy-feely. It’s not clear if he was always like that or if the accident had something to do with it. He’s bisexual, attracted to men and women, young and old, and it doesn’t take much to get him into bed at all. Sexual harassment is an everyday activity for him. He has a childish curiosity about everything and operates under an indecipherable set of principles. 

”All right, I’ve got it! Let’s have sex!” 

MangaGamer