https://www.melonbooks.co.jp/detail/detail.php?product_id=1797849
https://ec.toranoana.jp/tora_r/ec/item/040031041389/

Holy shit the girl looks so damn soft, Inue Shinsuke draws some of the most amazing set of boobs! love how heavy they look here

Also, It's NTR but she does it for the brother's sake who likes it, so... good ending?

Base +8, Ice_Cream +13, Yossarian762 +7, evilfuzzyman -6, lkoofu -9, SisterBrown +9, Adahmhra +8, MelmothTheWanderer +38, MisingNoZ +6, cycber +19, Coledas Ukgent +13

The brother still wants to fuck her but knows she won't say yes because they're siblings, so porn videos is the best he can get, not quite good ending.

Base +7, 58569 +6, netouyo +6, fidazzle +8, Yossarian762 +7, lkoofu +9, opodin +7, jesusomar95 +6, roskrad -8, Ice_Cream +13, SisterBrown +9, Shiro_ Ecchi +10, CxHxA +6, and 1 more...

@Kancas

Maybe not, but it's definitely better decision for both of them. Although, teasing about it probably won't have the best result. XD

Base +15, evilfuzzyman -6, lkoofu +9, roskrad +8, Ice_Cream +13, SisterBrown +9, Coledas Ukgent +13

I mean im pretty sure that having threesomes and public sex with random dudes isn't any better than having incest sex, but whatever, this is NTR.

Base +6, fidazzle +8, evilfuzzyman -6, lkoofu +9, opodin +7, bunchy bunchy +6, jesusomar95 +6, roskrad -8, Mirten +7, Ice_Cream +13, SisterBrown +9, Bedbin +17, Hurray456 +6, and 2 more...

She reminds of Tamako from Tamako Market.

Base +2, HSaint +6, expanium +6, Kurona +7, notdapooper +9, Ice_Cream +13, ZKYz +6, driven +13, SisterBrown +9, venom17 +6, Bedbin +17, ramaboy28 +8, alohawaii +8, and 4 more...

She looks like that girl from that KyoAni anime.

Base +6, lkoofu +9, Ice_Cream +13, SisterBrown +9, venom17 +6, MisingNoZ +6, Coledas Ukgent +13

Does this mean she's a good sister or not?

Base +6, Coledas Ukgent +13