a sudden incoming call late on Saturday night. "I missed the last train, so let me stay over~" It's from her sister, 'Yu'. I thought I refused, but a few minutes later the doorbell rang. And she just came into the house on her own. It seems she's had a drink, and she's closer than usual and has a lot of body contact. And her neckline is loose too... She presses her breasts against me as if she's deliberately trying to seduce me. What will happen if she finds out...? "It's a little touching, you know?" "Hmm? I'm doing it on purpose." Oh, I might be in trouble.