Gaccha Gacha manga at mangatensei.net,Chapter- 7.5.

Yuri and Motoka are friends, but Motoka isn't exactly a girl you should be messing with. Yuri later falls in love with Yabe, a player. However when she declares her love for him, he said he'll only date Motoka. Motoka acts like she doesn't want anything to do with Yabe but....is that her real feelings? But Yuri isn't going to give up on Yabe...and Motoka and Yabe seem like they went through a bad past with each other. But what is it? From Tokyopop: Yuri and Motoko are friends. Yuri has a crush on Yabe, but Yabe's decided the only girl he will ever seriously date is Motoko. But she doesn't want to have anything to do with him. Or is she secretly harboring a crush on him, too? From Baka-Updates: Do not confuse with Gacha Gacha Yuri Muroi's gone through quite a number of relationships and has that kind of reputation. She strikes up a friendship with a beautiful tomboy girl, Motoko, who helps little Yuri in times of need (aka bullying). Now Yuri has set her eyes on a sempai--Yabe. However, playboy Yabe seems to have been after Motoko for quite a while and will have no other. Yuri might have to taste the same medicine she gave another friend a while ago--a choice between love and friendship. Meanwhile, Motoko displays no interest in Yabe, but might secretly like him. As Yuri is drawn into a friendship with Yabe, Motoko, and Hirao, she begins to learn the horrible truth between Yabe, Motoko, and her dead sister Kanako and a terrible past that will never be fixed. Muroi has a suitor of her own: Sho Hirao, the student body president. Hirao is clumsy and tactless around girls. He is in love with Yuri, because she, unlike other girls, claims to be "thick-skinned" and smiles through anything, even if she has to take a beating for it, and even if she is vulnerable inside.