Kawaii Shinyuu wa, Tokidoki Otoko.

Mashiro's a nailist with zero experience in the dating department. Living together with Mashiro is Omi, a male cross-dresser who's as cute as he is angelic. The two together, with their love of fancy things, spent their days strictly as two platonic friends... Or so it seemed that way!! On the night Mashiro goes to a dating party, Omi appears, dressed as a boy, fervently kisses Mashiro and even laps at sensitive parts of her body with his tongue... The pleasure is so intense that Mashiro might lose her mind---!