Omokage by Mizuhara Tohru and illustrated by Takumi You is a ridiculous yet somewhat amusing book I mostly skimmed for kicks. The main character is a rather passive, docile, gentle type (ottori) who loses his mother. He'd never known who his father was, but he learns of two candidates from her diaries. He locates one and goes to meet him...And things get kind of nuts. As in yakuza nuts. It's really silly and funny with quite a bit of gratuitous sex.
( pics and some story )