MIAB-481 Review: Seduced by My Stepsister Onosaka Yuika and Her Big Ass

After 2 movie releases the previous week, Onosaka Yuika keeps the momentum going with MIAB-481, this time an ass-focused movie. A bit of a weird timing considering this would have fit perfectly with last week’s Panties Festival instead.
Here she plays a slutty older sister who seduces her younger stepbrother with her big ass. There are 4 main scenes with Scenes 1 and 3 having an assjob cumshot.
Table of Contents
TF = Titfuck, AJ = Assjob, TJ = Thighjob
Movie Details

Movie Name | 「パンツで擦るだけならSEXじゃないよ」布越し3秒の攻防!おせっかいな姉のヤリすぎ種搾りプレスで童貞奪われ何度も敗北射精させられたボク(弟)! MIAB-481 “It’s Not Sex If You Just Rub It With Your Panties” A 3-second Battle Through The Fabric! My Nosy Sister’s Excessive Sperm-squeezing Press Took My Virginity And Made Me (the Younger Brother) Ejaculate Many Times! |
Studio | MOODYZ |
Release Date | 6th April 2025 |
Pinching Finish (挟射回数) | 2 Assjob Cumshots (2 尻コキ射精) |
Movie Review
Scene 1 – Assjob Scene (1 AJ Cum)

Scene 1 takes place after a brief intro where Yuika catches her brother gawking at her ass, so she decides to ambush him at night while he’s sleeping. After letting him have a nice long whiff, she takes off her pants, leaving nothing but a T-back covering her ass as she grinds it against his dick to completion.

First off I’ll mention that it feels weird having the much older Nakano-san play a younger sibling character. Sad to say but I think his best years are behind him with him mostly having weak/fake cumshots, and I’d rather much prefer a younger actor with a slimmer build to highlight Yuika-chan’s full figure.

And speaking of fake cumshots, this one was most certainly it. But I can’t deny that it looked great, and at least they were smart enough to hide it with a zoomed out camera angle so that Yuika-chan can have more of the attention. Her acting has improved by leaps and bounds compared to when I first reviewed her a few months ago, where she’s now able to maintain a consistent pace of voiceovers throughout the scene. The assjob itself was also enjoyable with 10 minutes of uninterrupted grinding with all the important bits of her rear exposed.

Performance (演技) | |
Eroticism (エロ度) | |
Pinching Technique (挟むテク) | |
Finish (射精度) | |
Average |
Scene 2 – Sex Scene

Scene 2 is a sex scene that ends in a cowgirl creampie. There are some generous amounts of facesitting and ass grinding in the first half, but to me this was mostly forgettable especially with her keeping her top on the whole scene.

Performance (演技) | |
Eroticism (エロ度) | |
Pinching Technique (挟むテク) | |
Finish (射精度) | |
Average |
Scene 3 – Bathroom POV Oiled Assjob (1 AJ Cum)

Yuika catches her brother jerking off in the bathroom and joins in on the fun. It goes into POV perspective where she strokes and sucks his dick for the first half. She then oils up her big ass and backs it against his swollen penis until he cums between her crack.

Definitely the highlight of the movie for me. The shot of Yuika-chan’s full back figure oiled up and her face also being visible was super erotic, and I wished that the cumshot would have happened during that angle. The finish was decent with a visible spurt, though it could have easily been hands-free like how Ono Rikka did it.

Yuika-chan’s performance here was again very enjoyable. POV scenes live and die by the female performer, and she firmly belongs in the first category now with her improved dirty talking to complement her already natural-looking naughty expressions. In just two weeks she has now shot up near the top of my list of actresses to watch for.

Performance (演技) | |
Eroticism (エロ度) | |
Pinching Technique (挟むテク) | |
Finish (射精度) | |
Average |
Scene 4 – Sex Scene

The final scene is another sex scene, but this time with Yuika being fully naked which already makes it a huge improvement for me. The action here was also much more enjoyable with her getting into positions less common in JAV like pronebone, side missionary and reverse piledriver that show off her big ass. All of it culminates in a total of 4 creampies, with a very erotic end visual of her pussy literally filled to the brim with cum.

Performance (演技) | |
Eroticism (エロ度) | |
Pinching Technique (挟むテク) | |
Finish (射精度) | |
Average |
Summary
Overall a movie very worth watching for fans of Onosaka Yuika, which I suspect will have increased significantly now. The 2 assjob scenes are great fap material each with their own strengths, and the final scene is a decent creampie fest to get us “warmed up”.
Yuika-chan now joins a select group of “Triple Crown” achievers, having done a thighjob cumshot, multiple titfuck cumshots and now 2 assjob cumshots. Couple that with her improved acting and I can easily see her ending up one of my favorites for 2025 based on the hot streak of releases she’s having, which I hope will continue for as long as possible.

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