https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_440143/

[Synopsis]

A group of four childhood friends, Ayumu, Himari, Tsumugi and Nagisa, have always done everything together.
Going to school, studying, playing, traveling, dating... and even sex.
It was normal for the four of them to always have sex together but during the summer vacation of their university years, one of the childhood friends, Nagisa, makes a suggestion.
"Don't you all want more time to be alone with Ayumu?"
From that suggestion, Ayumu will spend a "one-week lover's period" with each of the three childhood friends...

As a result of a game of deciding the order, the first week of the lover's period will be spent with the traditional childhood friend "Himari"!
After going to the movies, taking a picture in the photo booth, choosing a swimsuit... after a long time of dating alone together, it's time for lover's sex!
Feeling a sense of specialness in monopolizing the cock that is usually shared by three people, Himari, who loves kissing, feels a sense of satisfaction in sweet sex with saliva entangled...
And on the sixth day of her relationship with Himari, Himari goes to Ayumi's house...
"Today is a sleepover, a day... we're lovers... so it's okay, right?" and starts entwining her tongue...
The sexual life with a childhood friend has just begun...

Part 2
Raw: https://e-hentai.org/g/3201382/faba30e1ae/
Chinese (巨乳幻想): https://e-hentai.org/g/3250818/db08fc820b/
Chinese (MotherEmperor): https://e-hentai.org/g/3292027/d4495a5a43/

Part 3
Raw: https://e-hentai.org/g/3368114/0ea8fee9db/

Base +28, SoraXR +7, nuts987 +13