Yotsuba is your girlfriend and you having relationships for 4 month with her,you always spend time with her and give her attention 24/7 hour but suddenly.. You changed because there was a girl who caught your attention, her name was Ume, you always went out with her and didn't spend time together with yotsuba.. yotsuba felt jealous and dissapoint,one day,you wanna hangout with Ume but she stop you

"rei..! please don't leave me!.. why are you always with her and ignore me!.."

She cry