https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_530082

1
https://e-hentai.org/g/3092877/bb34db2b61/

Base +25, Fofotron +25, darkwing42 +55, nuts987 +13

Ch1 English
https://e-hentai.org/g/3118843/ce1aa6b322/

Base +22, Guilhermee +6, Fofotron +25, darkwing42 +55, nuts987 +13

[Synopsis]

"Kanon's sister must be... incredibly beautiful, with big boobs and erotic...!"
A few weeks have passed since Kanon, the gal who was always happy to do it with him, suddenly vanished like the wind (she was returning to her mother).
He was completely depressed, but only for a moment... Every day, Wataru was immersed in fantasies about Kanon's sister, Seira.
Finally, he receives a happy message from Kanon --- ''I'll come and play again~?''
Wataru is overjoyed....because... of course, this time her sister will be with her.
And finally, the day arrives. They are about to reunite and meet!
There is a dazzling miracle...Standing next to Kanon is Kanon's sister, Seira, who far exceeds Wataru's expectations and fantasies.
Wataru quietly feels his penis filling up with power.
That night, he first has sex with Kanon for the first time in a long time.... The two of them get excited and passionate.
Remembering the pleasure of going to the bathroom late at night, Wataru stays in the bathroom the next night and waits for Kanon to contact him...
However, after a long reunion and oral sex, Kanon falls asleep from exhaustion after a full day of work.
Unaware of this, Kouki is alone in the bathroom in the middle of the night, waiting for Kanon's reply.
Just as Wataru's anxiety reaches its peak after receiving no reply from Kanon, the bathroom door quietly opens...
''Kanon! I've been waiting for you!'' he cries out and what catches his eye is... Seira, holding the bathroom doorknob with her eyes wide open in shock...
Just like last time, Wataru is completely naked, clutching his prized cock and leaking pre-cum...
Just when he thinks it's all over, Seira's reaction is unexpected... (͠≖ ͜ʖ͠≖)

Base +25, Fofotron +25, darkwing42 +55, nuts987 +13, zeca1 +7