The ending vocal song for 'Harmful and Heart' is performed by the voice actor 이이로 of Hong On-seol.
| Purpose | Ending theme |
|---|---|
| Release date | 2026-03-20 |
| Duration | 3:09 |
Style and distribution
The song adopts a pop rock style, expressing the awkwardness of facing someone you like. Released on March 20, 2026, under the name LeoN, with track titles specified as Feat. Duration: 3 minutes and 9 seconds.
Related entries
- Works used:harm to the heart
- Performed by:이이로
- Artist Credit:LeoN（마음스위치）
References
Data compiled on: 2026-10-07.