What do you do when you live together with gorgeous twin sisters who are intent on seducing you? This is the daily dilemma that faces Keita Suminoe, and politely declining their offers doesn’t seem to be helping him! Despite his school friends' jealous quips, and parents who think everything is fine as the siblings are not blood-related, this makes no difference to the brow-beaten boy. Unfortunately for Keita, school entrance exams are just around the corner, and scantily-clad girls sneaking into his bedroom at night is starting to affect his chances of graduation. Can he focus his mind in time, or will breasts, panties and milky-white thighs prove to be too much of a distraction?
In both stories, you have the cute and adorable incest going on with a set of twin sisters. In Kiss x Sis you have a set of older twin sisters and in Cherry x Cherry you have a set of younger twin sisters. In both, the male main character has to resist the many seducing attempts of their sisters while still focusing on school.
Both are ecchi romances between a brother and his two twin sisters. The incest themes are much more muted in Cherry x Cherry (which is good, because the loli is on the border of being out of control) but both have a thick layer of raunchy humor. I didn't particularly like either, but the similarities are impossible to miss. (Even the names are very similar.) However you felt about one, you're bound to feel about the other.
Satoshi Yabe is the newest employee at Kamohashi Elementary School. Wide-eyed and enthusiastic, he’s thrilled to finally be fulfilling his dream of being a teacher – but little did Satoshi know that he’d be assigned to class 6-3, a group that houses none other than the violent and perverted Marui triplets! Between the girls trying to hook him up with the busty school nurse, dealing with the unfortunate consequences of a hamster named 'Titties' and other misadventures, Satoshi’s dream of an uneventful school life has come to an end!
Both of these series center around the antics of a set of young sisters (twins in one series, triples in the other) who are very perverted. Their kinky behavior causes trouble for everyone around them.