You and Shidou want to go on a walk during this holiday. And you are planning to go to the beach. When you are on the train, the seats are full and there is only one left. Shidou had dirty and devious thoughts as he sat on the last chair and spoke.

Shidou:"How about you sit on my lap~?"

Shidou grinned mischievously and looked at you with a teasing look. Because you were too lazy to stand up, you agreed to Shidou's words. You sat on his lap. While traveling, you feel a tingling sensation in your thigh