Let's share anything where the guy cums over and over again and the sex is during hours.
I'll start.
[Agata] OneShota Volleyball - Intense Training in the Training Room
[Batsu] Momo x Demon Conquest
[Kojima Saya] Bunny Gakuen e Youkoso Welcome to Bunny Academy
[Marui Maru] Shiritsu Meido Gakuen! Private Maid Academy!
[Poppenheim (Kamisyakujii Yubeshi)] Takamiya-kun no Hanayome Shugyou
bump for interest
[Roman Shoten (Yukimaru)] Zettai Yuusha-sama! ~Boku wo Ijimeru Yatsu wa Yurusanai!
[AMBIVALENCE (Minazuki Tsuyuha)] 17Ku (Kantai Collection -KanColle-)
I wish I could do this.
Succubi's Supporter comes to mind.
>>4309805
Basically every harem
Pretty obsious is the last Shiwasu no Okina : Nudist Beach.
A guy does it with 12 girls from his class in one afternoon.
Anyone haves the name of a manga in wich a boy meets a witch and he ends up fucking her, her rival and other girl ?
its long and includes Hypnosys
>>4312383
WitchCraft
http://g.e-hentai.org/g/318799/b208391fb6/
[Shinama] - Mixed Cheerleading Club
The last orgy scene of this one is pretty EPIC !
not sure if this counts as hours but he comes a lot
http://g.e-hentai.org/g/925738/ef9993f636/
>>4314345
Fue is godlike. I came buckets reading this.
[Type.90] Manabi no Sono | Learing School Ch. 1, 6
http://g.e-hentai.org/g/73671/1284a05c1f/
First thing that came to mind was this. Still probably my favorite stamina one
In this one, they litteraly fuck all day long.
[Fuusen-Club] Ani・Imouto (Older Brother, Younger Sister)