Onegai☆Twins: Natsu wa Owaranai  

Please Twins! Onegai Twins OVA, おねがい☆ツインズ 夏は終わらない, Please Twins!: The Summer Never Ends, Onegai Twins OVA

Two weeks have passed since the conflict between Maiku, Karen, and Miina was resolved, but their lives are busier than ever. Karen is consumed by her newfound brother, while Miina yearns for attention, leaving little time for Maiku to focus on his work. In response, he decides to venture into the woods and set up a camp where he can work in peace. However, Morino, who has been causing trouble, plans a field trip to Maiku's campsite and encourages everyone to make some unforgettable summer memories.