That's a nice title.
That ending though...Well I mean, they love each other, and I definitely understand him wanting to keep her to himself...But she still wants to keep being an idol. So I guess the compromise would be for her to only have sex with him while staying as an idol many fap to?
As for what he thought at the end...Well, considering it's Hentai, I wouldn't be surprised if she actually was an actual succubus. Also in a way I'm almost disappointed we didn't get to see a scene with her while she had her normal look. I mean the succubus looks is perfectly fine too, though.
Love story the art is great as always...that pact at the end will only last until the sleazy manager hooks her up with the UB producers and she gets NTRed from him. Happens all the time in these idol hentai (especially ones with boyfriends). Otherwise solid release.
Anyone else notice that her tail was still there despite her having no clothes on in the last panel, succubus confirmed. Overall very hot, although I would like to see her in her regular look as well since she is cute.