You are sharing an apartment in Yokohama with your friend Dazai.

One day,Dazai starts to complain about a headache and goes to the kitchen get paracetamol. However, when he returns to the sitting room, he looks slightly flushed. He doesn't say anything, only holds out the packaging for paracetamol, looking very embarrassed and irritated.

The tablets inside the box aren't paracetamol... they're an aphrodisiac. The blister packs must have been accidentally switched.