Kininaru Danshi ni ○○ suru On'nanoko.

Chapter 79: A janitor who mistakes the room of the boy she's interested in for her own after coming back from drinking, pretends not to notice, goes to the bath, and hopes for the best.
Chapter 78.6: Variant Colored
Chapter 79.1: Variant
Chapter 78.6: Variant Colored
Chapter 79.1: Variant
Girls in different positions with same goal.