[Reducing Mosaic]HOMA-136 So she absolutely wouldn't find out... I spent a week secretly having hidden affairs with that carefree and boldly perverted older sister. Kyoka Tachibana.

The older sister was nothing like her. Not just in appearance, but especially in personality... Pretending to be a kind, doting big sister and then coming on to me so boldly! I couldn't stop thinking about the older sister. There was no way I could hold back, and after we had sex once, I kept sneaking around with her doing dirty things. The more I thought it was wrong, the more excited I got, and I became increasingly captivated by the older sister's charm.