So the girls are sisters and the guy is their cousin?

MistyWanderer said:

So the girls are sisters and the guy is their cousin?

Yeah, the older sister and the guy are the mainstays in this artist's long-running Itoko(Cousin)-chan series in which the main focus is her lusting over him after she made a childlike vow to marry him when they were both much younger. She often intentionally (and sometimes unintentionally) teases him sexually, and it seems they fully cross the line regularly in the paid reward versions. The younger sister was introduced at some point as a "rival" of sorts who seems determined to protect her sister's chastity by stealing away his attention with her own body. The mom also makes occasional non-sexualized (thus far) appearances, mostly to up the stakes while they engage in stealth incest shenanigans. The guy is older than them and works as a teacher at the school the older sister goes to.

NinjaPope said:

Yeah, the older sister and the guy are the mainstays in this artist's long-running Itoko(Cousin)-chan series in which the main focus is her lusting over him after she made a childlike vow to marry him when they were both much younger. She often intentionally (and sometimes unintentionally) teases him sexually, and it seems they fully cross the line regularly in the paid reward versions. The younger sister was introduced at some point as a "rival" of sorts who seems determined to protect her sister's chastity by stealing away his attention with her own body. The mom also makes occasional non-sexualized (thus far) appearances, mostly to up the stakes while they engage in stealth incest shenanigans. The guy is older than them and works as a teacher at the school the older sister goes to.

Thanks for the info.