After failing an exam, she met him. After a silly blind date, she became his silly girlfriend with the help of his mother. After an unexpected trip, she actually had to sleep in the same room with him!
He made a vow with his mother, and he who was supposed to live a peaceful life as a firefighter for seven years became a soldier of his parents two years early because of her intervention; the game-like blind date made him deeper and deeper into the situation, which he should have dealt with skillfully, until they had sex. Should he take a step forward or take a step back...