>>714653402 (OP)It's a pretty fucked up moment but that's the point. Saejima had a terrible impulse after being in the can so long without seeing women and came to his senses. It's a heavy scene but it's there to show how much prison has changed Saejima, yet not enough to completely degrade him as a person.
That being said, people nowadays just don't have the maturity to see that. They'll either bitch and moan because they hate seeing problematic content or make jokes about Saejima being a pedophile despite the fact that he DIDN'T do anything to Haruka.