Lots of men in this manga is actually derived from real japanese celebrities. I was surprised in the first chapter seeing the host of Nogizaka Under Construction lol. I couldn't believe it at that time.
to the people saying that halo halo is popular in Japan I'm here to tell you that I'm living here and it is not like what you think. Ministop sells it once every few years during summer and that's about it. Not like...
For anyone who is confused with the "ejaculating" bit I think he is saying" 写生 - shasei" which means sketching (as in the costume outline for the cosplay) which also have the same pronunciation as "射精 - shasei" which means ejaculation. I haven't read the scans but it is a possibility.