Nageki No Kenkou Yuuryouji Episode 2

Hiroe is seduced by Takami into helping her get together with Mayaka, who she has a crush on. When Mayaka learns of her trick, she challenges Takami to a sex match, the winner being whoever can make Hiroe climax. They are stopped, however, by the landlady, Yayoi, before she joins in on the fun.