Jekyll and Hyde Boyfriend

I'm Sachi Asahina, 17 years old. I'm concerned about my boyfriend, Yuki Saeki, who is way too stuffy. We've been dating for three months and he hasn't even kissed me yet... But one day a trendy-looking Yuki suddenly appeared at school. Seeing how surprised I was, he told me that he was Mizuki, the other personality within Yuki. My secret is that my boyfriend has a split personality!!

(Source: Renta!)