
Your younger sister is in the midst of rebellion. However, she is very interested in sex, which is problematic. In short, it's a situation like, 'Don't look, just lend me your penis, you damn brother.' She touches your genitals with superficial sexual knowledge she's picked up somewhere. She tries to lick it with some effort, or attempts to insert it into her vagina. Please enjoy life with such an impertinent younger sister.



















The concept of turning the younger sister into a lover wasn't bad, but even for a fantasy, her skills are way too high for someone with zero experience—kind of immersion-breaking lol. And the no-handed bra removal? Yeah, that’s not happening in real life. My biggest gripe is that she has a tsundere vibe but never actually gets 'dere,' plus the final missionary scene is way too far away. If you're looking for perfection, you might be better off with the previous 'Ona-Support' release.
Bought this the moment I saw it was an Airu sister-themed work. The close-ups are great, and we get three rounds (face-to-face, cowgirl, missionary), which is solid. But I really wish she’d been more 'lovey-dovey' with her big brother from the second round onwards. Really hoping the next sister installment features that desperate, 'I love you, big brother' kind of gameplay.
The plot is classic AV trope: a girl who doesn't want to get teased at school for being a virgin decides to lose it to her brother. Whether you can get immersed in this 'hates the brother but obsessed with the D' dynamic is the real make-or-break here. She insults me and hits me, but I just head-canoned it as a cry for attention (except for the part where she likes the D, that stays as is lol). Visually, the scene around 5:20 where she turns her back is a masterpiece (it's the 8th sample image). The way the skin bulges out of her panties is just perfection. The final missionary scene is also great because the camera captures the full body rather than just a tight face shot. My only gripe is the kiss scenes felt a bit lackluster compared to her other VR works. But overall, I had a blast 'teaching' my little sister, and Airu Sato was as gorgeous as ever. Totally worth it.