A Romance Game: Secretly Playing Lovers with Chihaya Anon

Over a candlelit dinner, Chihaya Anon, the goddess of our class, suddenly said to me, "Let's play a game." The rules were simple: we had to pretend to be lovers and do all the things couples do. But there were two conditions: we must never get caught, and neither of us could be the first to bring up breaking up. I thought it was just a whim of a rich girl. That is, until she opened an app called "100 Things Every Couple Should Do" and announced our first mission. The morning after we completed the "Spend the Night in the Same Room" mission, my little sister walked in. Chihaya Anon panicked and hid in the closet. My sister stared at it. "Big brother, there are signs that someone else has been in your room... aren't there?"