Hey guys a little background

Izuku Midoriya has a quirk, called "Dark Scars". This quirk makes another person extremely sad, useful to make a villain think about what they are doing and who they are affecting. But there are two drawbacks to his quirk. It takes a massive amount of energy to contain his quirk so not to use it on innocent people. It also leaves scars all over his body.
When it turns out that Izuku's quirk can do more than affecting other people's feelings, How will his classmates react to his new power?