Moshimo Toumei Ningen ni Nareta Nara

A thing that everyone has once dreamed of.
"If I could become a invisible man"
Don't you wanna make the dream come true?

The protagonist becomes invisible and goes to a cosplay convention.
He teases Yuma Izumi, a cosplayer with big breasts, in front of many men with a camera!

[From DLsite English]