https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_638899

Prequel (Raw): https://e-hentai.org/g/3473830/dfe5dbf410/

[Synopsis]

One day, towards the end of summer, Julian and his friends were enjoying a "vacation" on a deserted beach.
"Ah... Ah... Ah..."
As multiple people relentlessly caressed her lotion-soaked body, Mikina was consumed by the waves of pleasure that overflowed from within.
The school close to the beach was Mikina's alma mater, from which she dropped out.
There was a specific reason for Julian's visit this time.
"In exchange for one condition, Mikina will be able to attend school again."
That condition was...

Base +28, KingLucas +6, nuts987 +14