Bathtub ni Notta Kyoudai: Chikyuu Suibotsu Ki

On the eve of his seventeenth birthday, Haruo was hoping to finally lose his virginity. But the morning of his birthday, a big surprise awaits him: he wakes up with his room submerged by water! No time to think, and to avoid drowning, he is obliged to take refuge... in a bathtub! Worse than all, he