I was asked to look after my younger childhood friend, Rena Miyashita, while her parents were away on a trip. Since our parents are close, I ended up taking care of her for five days. Though she acts cold and distant, she sneaks into my bed at night because she's afraid of sleeping alone. She also joins me in the bath, saying she's scared and embarrassed to bathe by herself—showing up in her school swimsuit. Despite her feisty, arrogant personality, she has an oddly endearing charm that leaves me completely flustered. Could her tsundere attitude—acting aloof while secretly initiating intimate moments—be a sign of hidden affection? Experience the full POV depiction of this teasing, cohabitation romance!