https://book.dmm.co.jp/product/6295675/b064bcmcm03191/

So no extra story for the Tankoubon release, oh well, the individual releases did end on a pretty conclusive note and arguably satisfying too if you are into cuckoldry, since it isn't a total loss netorare ending as once Junna fully revealed herself to have fallen completely for Ryo's cock beyond the bet she lost, she managed to string her boyfriend Kyotaka as a good cuck who instantly resigned himself as a cuckold who can watch his precious Yunna streamer, who he now knows was Junna all along, masturbating from the side, with Junna still considering Kyotaka to be her boyfriend, hoping he is enjoying her streams.

Base +22, Senpai SAP +6

@Goukenimaru
Wild guess: No extra story because author was salty sales plummeted hard with chapters 3 and 4 because he misread his audience with ch3 ending even thought it was obvious it was aiming for the ntr ending. Perhaps people are just tired of the "STRONG WOMAN, oops she's folding over easier than lawnchair already hahaha my bad" false advertising.

Base +23, freeill30 +6, 十年风少 119 -5, Senpai SAP +6, 123nope -8

Bills had to be paid I guess.

Base +8