In "Super Lovers," Haru Kaidou, the eldest son of his family, travels to Canada after learning his mother is seriously ill. When he arrives, Haru finds out that his mother tricked him, and he is now responsible for looking after his adopted brother, Ren Kaidou, a quiet boy who feels more comfortable around dogs than people. At first, Haru struggles to connect with Ren because of his distrust, but as time passes, their relationship grows closer. Haru makes a promise to Ren that they will live together in Japan after he finishes high school. Unfortunately, a major accident causes Haru to lose all memories of the summer they spent together, including this promise. Five years later, Ren shows up in Tokyo, expecting Haru to keep his word. To Haru, though, Ren is just a stranger who claims to be his brother.