START-014 In the plot, Shogo, the younger brother, returns home only to find his older sister Mana in a pathetic state as a NEET loser addicted to video games.
To make matters worse, she is also addicted to intense masturbation with dildos. This becomes too much for Shogo to observe, leading him to give her the real thing.
And with her addictive personality, she gets hooked right away.
