Heart no Shindenzu

 (ハートの心電図) is an idol group founded on April 1, 2021, with a medicine concept.

They debuted on August 19, 2021, originally set to on May 6, 2021.

Members

 * Hoshi Tsubaki (星つばき; )
 * Nemuri Nen (眠裏ねん; )
 * Egami Nana (廻神なな; )
 * Minase Eri (南瀬絵梨; )
 * Momose Mari (桃瀬まり; ) (Joined July 23, 2021)