Is this hentai?

What starts off as a silly panty shot galore manga of a girl going to the arcade turns into some weird fantasy gaming sexually assault Mario cart sessions. Like I legit didn't know what was happening half the time. Then a battle between the two new female leads for the attention of the normal boring main lead? What originality.

Yet I still read it. I was stunned at the turn of events sometimes. When they played Mario cart and the guy used the banana and the banana in Mario cart makes you spaz out of control but in this it landed on the girls vagina, causing her to suddenly burst with confusion. Then a tentacle monster started to gr--- YOU KNOW WHAT. You have to read it to believe it.

A what the fuck did I just read out of 5.