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Junpei called his senior, "I-chan," who said that his bathtub was broken, into his room, and after two nights, he got drunk and got into a physical relationship.
The next day, Junpei was ready for "insertion," but as soon as he mentioned about his former employee, Tsujii, his face changed.
In the end, Junpei failed and it was the day when I-chan went home -- --.