HYPER HEARTS (超心) is one of many MORNING JIKAN sub units.HYPER HEARTS was formed in March 2013,consisting of Morning Musume 10th generation members Iikubo Haruna and Sato Masaki,and Happy Jikan Seventh Generation members Zeng Yun and Bui Shun.
- Iikubo Haruna (飯窪春菜; Chocolate) Leader
- Zeng Yun (曾云; Light Blue)
- Sato Masaki (佐藤優樹;Yellow)
- Bui Shun (杯顺; Green)
- [2013.08.17] Dominant Flame
- All the members are hyper when they don't mean to be,so that is why the group's name is HYPER HEARTS.
- All the members are in the same generation in their groups (Iikubo and Sato are both 10th generation members of Morning Musume,and Zeng and Bui are both 7th generation members of Happy Jikan.).
- Tsunku said that their debut single is going to be relitively close to Morning Musume's "Help Me!!".
- HYPER HEARTS's image is to be active and cool.
- Iikubo's color is based on her old Morning Musume color (From 2011-2012,Iikubo's color was "Chocolate".).
- Sato and Bui got really excited when they found out that they would be joining the same group.