Himitsu no Kemonotachi

1) Gentle Beasts (Yasashii kemono tachi) : Shizuka gains older twin brothers via his mom's remarriage and finds himself hopelessly smitten with both of them. Can he manage to date both of them at the same time?

2) Secret Beasts (Himitsu no Kemono tachi) : The grown-ups go on holiday and entrust Shizuka to the care of his twin brothers.

3) Something faster than love (Koi yori mo hayai mono) : Clever and curious middle-schooler Yuki is determined to try out what he's learned from his sister's yaoi mags on his friend, Akito.

4) Lovely Lovely Witch-sensei (Suki suki Majyou Sensei) : Nanami is a middle-school teacher born with a curse. The only way to remove it is by having sex 1000 times with his true love. Things get complicated when his true love turns out to be Aki - one of the boys in his class. (Shota)

5) Naughty Witch-sensei (Ikenai Majyou sensei) : Aki goes away on a school trip that Nanami isn't involved in. Nanami is so lonely he has to take matters into his own hands.

6) At the end of your world (Anata no owaru seikai ni) : Mana and his brother have lived alone ever since their mother died. When Kinezaki-san, his brother's friend, comes to stay, he finds the brothers' activities to be a bit unusual. (BDSM)

Extra : About brother and brother (Oniichan to oniichan no moto) : Shizuka and the twins return.

(from B-U)