Yeah i will abandon Mayuku too. I mean, yes Izumi is not really clever by doing all this things with Hatsumi while accepting Mayuku's fiancé but damn that's not areason for Mayuku to bully Izumi. That's stupid reasonement.
Edit: Found a site who talk about the entire vol.2 and so i will copy paste it for those who want to know the end since it god abandonned.
But this is only because Mayuko has other plans…. Mayuko convinces Sakura to help her.
That night, in a somewhat convoluted scene, Mayuko tries to seduce Izumi into making a formal promise in the chapel, but is rejected because, Izumi says, Mayuko rejected her when she asked previously. Izumi can see that this is some kind of set-up and sure enough, Sakura and Hatsumi were there to see it. Izumi tells Mayuko that if she’s going to make a vow with anyone, it’ll be Hatsumi, and Mayuko, in what was a stellar moment of bad judgement, throws herself out the window…which is only one story up, so instead of killing herself, she breaks an ankle.
Hatsumi is still seeing Izumi and trying to get a clue about Sakura so, she decides to have it out with Mayuko…which she does. Big time. Mayuko throws stuff at her and she hauls off and slaps the upperclassman across the chops, instantly rising in my esteem.Back at school, Hatsumi appears to have clued in finally and decides that the one she wants is Sakura, while Mayuko and Izumi reunite and make up, along with protestations of love all around. The End
There is a third volume but it's not related to this story.