Kanojo mo Kanojo

Synopsis

Rika talks to Naoya casually in class so Saki jealously insists he stay by her side, though Naoya mistakenly believes Saki is just lonely. While escaping Rika, they are forced to change for PE in the same room. Nagisa lures Rika to the roof with the photo she kept proving Milika is a student at the school, allowing Saki and Naoya to escape. Later, Nagisa admits to being jealous Saki and Naoya got to be close all day. Saki offers to leave them alone so they can cuddle, but Naoya insists she stays to watch. Saki is surprised watching makes her excited and wonders if she might have an NTR fetish, so she punishes Naoya. Rika continues to talk with Naoya, who starts to suspect Rika might have a crush on him. The girls, happy Naoya is so dense, convince him Rika is probably in heat and after any available man. Naoya is mistakenly convinced this happens to all women and offers himself to Saki and Nagisa should they encounter the same problem. Naoya apologizes to Rika for thinking she had a crush on him, embarrassing her in class, so she drags him away for a private talk.

(Source: Wikipedia)