Makoto, Gintaro, and Satoru are accompanying Haru on a walk through town when they happen to pass by a large temple.  Makoto overhears a familiar voice and it turns that the temple is the home of Yumi's boyfriend Shohei.  Inside, they're introduced to Shohei's unique family.
Oh, Serika-oneechan.
Oh, Serika-oneechan.
¡Oh, Serika-oneechan!
¡Oh, Serika-oneechan!
Oh, Serika-oneechan.
Ah, Serika.