Substitute Toyokawa Shoko, you can become stronger by breathing

Traveling through the Tokyo of a parallel world, Kujo Renji spent ten years climbing from a castaway in Tokyo Bay to the emperor of Kanto Yakuza, but on the eve of his redemption, he was turned into a vegetable by the system truck.
When he opened his eyes again, he had become the most contradictory existence in the MyGO world line, the manager of the genius band Ave Mujica, and the down-and-out daughter of a wealthy family who was being crushed by her alcoholic father and the status of a chaebol's abandoned son - Toyokawa Shoko.
Also accompanying him through time is the "Original Sin System" - the harder he breathes, the stronger his ability.
Calling his good-for-nothing father a "parasite" increased his piano finger speed; exposing the band members' hypocritical tears improved his physical fitness by 20%.
Not only outsiders, but even breathing on Shoko Toyokawa in the body can gain the ability.
The most urgent task is to resolve the dilemma that the original owner of this body, Shoko Toyokawa, is facing.
The band is on the verge of disbanding
But after understanding the situation, a question mark appeared in Kujo Renji's head.
"Are you an idiot? If you trick them into signing a trap contract, won't you be able to suck their blood for the rest of their lives?"
Suffering such humiliation, Toyokawa Shoko was so anxious that tears welled up in her eyes.
"Please stop ruining my life!"