SHIC-296 Until that innocent girl turns into a pervert... 4 hour story (SHIC-296)

What happened to Mayu-chan, the once innocent and beautiful girl that everyone was talking about? The key to this lies in her own brother! When her brother approaches Mayu in her tracksuit, she ends up fulfilling his request, which ignites her heart and body... And then Mayu's evil hand closes in on her father...