向かいに越してきた隣人OLの絶倫セックスに溺れた僕

From his window, this guy can observe clearly the neighbor couple living in the opposite building. He feels quite jealous because the wife is quite a bombshell. But he also noticed that the couple argues often, and one day, the lady unexpectedly waves at him. Aika Yumeno, espectacular as usual.