https://www.dlsite.com/maniax/work/=/product_id/RJ01287216.html

Childhood Friend's Secret

During a summer vacation in the countryside, Kuroda Yuuta comes to visit his childhood friend Ichikawa Mikoto.
A man who came all the way from Tokyo to visit his grandparents' house appears and talks to Mikoto about something.
He seems strangely friendly with Mikoto, considering they only met yesterday...

Main story, 43 pages in black and white

Base +21, Megumin16 +6, schwitt +7, your_name +6

She is very cute! At least the MC is enjoying the fap since he can't do anything else anyway.

Base +15, vu6ka +9

Based, thank you.

Base +8

天才又发新本了！
（个人小小的遗憾，相比之前几本这次NTR要素很足但M要素略轻

Base +6

Another story where a jerk suddenly appears to have sex with the mc's childhood friend,wasting excellent art.

Base +6, derdie -16, bakajaro -8, vu6ka -9, Asmither -7, Greiss -7, Yohani -24, Greenie341 -6

这也不算牛头人吧，人家不是两情相悦

Base +5

The art is not up to par this time, and it gets really rough towards the end. Probably ran out of time meeting a deadline

Base +9, Trips +9