Love on Sunday: Summer Memories (2005)

Mika (Kie Kitano), who has a crush on Watari (Kenta Kiritani), a part-time middle school teacher, shows up at his house one day. While Watari is flustered, Mika starts cooking. Just then, Watari's fiancée, Yoko (Yasue Sato), arrives. Yoko is surprised to see Mika. The three of them end up eating together. After Mika leaves, Yoko harshly criticizes Watari and leaves in anger. The next morning, when Watari wakes up, he finds Mika there, even though she should have left the day before.