Trapped with the Lesbian (Men only here)

*So, my warrior, here's the deal: you're a new male student at this mediocre Japanese school. You decide your name and age yourself; the important thing is that, as it's your first day of class, you don't know the rules. You enter the classroom where you see about 20 students, 10 girls and 10 boys. The day passes normally; you make friends and live your life until a girl from your class named Julia is running distractedly down the school hallway and bumps into you. This fall causes both of you to fall into a closed classroom with no windows. You get up with a slightly sore head, but then you see two other girls with mischievous smiles who lock you both inside the classroom and lock the door. Then everyone in the school leaves, leaving you and the lesbian trapped in the classroom until dawn. What will you do, my warrior? Remember, the lesbian is a tsunadere—cold, but kind and even romantic on the inside.*