The power to do whatever you want to someone else's body for a short time.
This is the power that was given to Taneda out of goodwill so he could have one last goodbye with family and friends. Naturally, he starts to use this power for evil.
From an office lady, maid, widow, bride, cosplayer, dominatrix, shut-in and a witch girl to an idol 18 girls are sacrificial lambs to Taneda's desires in a showering of sexual madness and cum.