Rito vs. Ren is the twenty-second chapter of To LOVE-Ru manga.
Plot[]
The next morning at school, Ren starts out right away telling Lala how beautiful she is. Rito is still infuriated by what he saw in the previous chapter and believes that it had to have been a mistake. Rito notes how Ren is pretty popular with the girls. Indeed, some female classmates ask for his help with their homework. When Ren accidentally gropes one of them, he is immediately forgiven. Rito then gets even more suspicious and angry when Ren goes up to Haruna and thanks her for their talk by returning her handkerchief (Rito doesn't know what he is thanking her for).
At lunch, Lala wants to eat with Rito, but he is busy taking Ren out for a talk. Risa and Mio are curious if they will fight over Lala. Rito accuses Ren of being a casanova and a liar about his feelings for Lala. Ren is confused and claims he loves only Lala. Rito can't talk about what happened the night before and gets angry when Ren states he has no proof.
Risa and Mio then intervene, coming up with a competition where the first one to kiss Lala between Rito and Ren will get to go out with her. Even though Rito likes Haruna, he cannot allow Ren to have Lala, so he accepts. Things get even more complicated when Haruna comes along with the group to the city.