A Secret Story Between Yui and Her Big Brother

Synopsis

Yui, my beloved little sister. She’d never had a boyfriend, never even kissed anyone. But I couldn’t help myself and crossed that line with her.

At this point, who cares about morality?! She’s just so adorable I can’t stand it anymore…yo! …But then.

I accidentally read it. Yui’s secret diary. It was packed with forbidden erotic stories.

Dammit, what is someone doing to my sister?! I cursed at whoever was her sexual partner.

But who the hell is it anyway? Her boyfriend? No way, no way, absolutely not!

…Dammit, if that’s how it is, I’ll make Yui’s own body confess the truth!