Your Name is Star (Kimi no Na wa Star)

Hoshimi Sudou is known as a lady-killer at the office. But Sudou leads a double life - lady-killer office man by day, awkward yet charming singer in an amateur band at night. His co-worker Hirokawa stumbles upon Sudou late one night on the street and is taken by his true face. At work Hirokawa finds himself becoming more and more attracted to Sudou and sets out to seduce him.

From DMP