Virgin Killer Ninpouchou - Vol. 1 Ch. 1

[RyuuStarLight]

The chief here and in My Tiny Senpai would be best friends if they ever meet

 

[January]

who are the ball people

To find out, check out the critically acclaimed manga by the same author, killing me/killing you!

 

[January]

Noticing a pattern here...
All three mangas by this guy has been about a masked muscular guy goofing off with a eccentric smaller girl