Birthdate: June 9 Horoscope: Gemini Height: 187CM Weight: 67KG Blood Type: B Age: 21 Job: Trainee teacher / Student Mizushima Iku is a 21 year old who’s still in college and has to do a teaching internship for 3 months. His mother and Kotarou’s mother were friends so Kotarou often looked out after him and he’s the one who helped him get into the teaching internship. He used to be in a music band which Tsukiko was a fan of. Iku had a twin sister died from heart disease while she was in high school. After she died Iku tried to hide his pain by overworking and singing too much until killed his voice and had to retire from the band.