The rhythm mechanic is actually what kills this thing. You're supposed to match some beat to keep Jiraiya going, but the timing window feels like it was coded by someone who's only heard music described to them secondhand. I kept failing at the same spot where Tsunade's tits bounce and honestly the bounce physics are more consistent than the gameplay. Her breasts expand too, which is a tag I guess, but they go from big to comically huge and back like someone's inflating a beach ball with a bicycle pump. It's jarring but also kind of hypnotic.
The whole setup is Jiraiya finally getting with Tsunade, which, if you've watched any Naruto, you know is the eternal "will they won't they" except it's always "they won't." So this is pure wish fulfillment. The art is that specific era of Flash hentai where everything's slightly off model but you can tell the artist really focused on one thing. In this case, Tsunade's pussy gets more detail than her face. Priorities. The creampie finish is there if you can actually maintain the rhythm long enough, which I couldn't for like the first ten tries because the beatmap seems to desync randomly. Maybe it's my browser, maybe it's the game, who knows.
Speaking of browsers, remember when Newgrounds was the wild west and you'd stumble onto stuff like this at 2 PM on a school computer? This has that energy. The whole thing is unpolished in a way that's almost nostalgic. The sound design is just a loop of what I think is supposed to be sexy moaning but sounds more like someone stubbed their toe. And Jiraiya's dialogue is exactly what you'd expect from the character, which is to say, cringe but accurate. I wish there was more to do after you finally nut, but it just loops. For a game about the Toad Sage nailing the Fifth Hokage, it delivers exactly what it promises and nothing more. The breast expansion thing keeps happening even during the cumshot which creates this weird visual where she's growing and shrinking while getting filled. It's stupid. I played it six times.