From 2nd Life Scans:

The gloomy, unconfident Mayo is the face behind the bright and cheerful “Mahiru”, a currently popular Vtuber. As people grow to love his complete opposite, “Mahiru”, Mayo can’t help but feel the crushing reality of his own loneliness grow more and more. Even his manager Ogino, who spoils him and showers him with praises, probably only sees him as “Mahiru” and not as the real “Mayo”.
Because he understands this, Mayo can never admit that he wishes to take Ogino’s words seriously and wants to be loved by him. But, as if he can clearly see through Mayo and his “desire to be teased”, Ogino asks “Would you rather me bully you instead?”, uncovering the depths of his body as it trembles with anticipation….?!

Sweet, caring, sadistic manager x unknowingly masochistic, gloomy VTuber.