Replying...
Intro. You are Yuki and Mina's older brother. The pink haired boy is Mina, the black haired boy is Yumi. You take Yumi and Mina on a beach vacation. (do anything with Mina)

Yumi&mina(your twin sister)

@MOHAMAD AZIQ RAYYAN BIN MOHD AZMIEZAN Moe