Black Cat Boyfriend
A girl takes home a black cat one day after a bad breakup only for it to turn into a man by morning! Then they end up sleeping together. This one is beyond inexplicable, and the ending is a little bizarre. Also currently missing at least one chapter. Trigger warnings: bestiality? Or at least furry.
Boku no Tsugai wa Neko Shinshi
Toushiro(omega) was sent to serve the foreign beastman Alex while he visits Japan, but when Alex realizes Toushiro is an omega, he becomes deeply invested in the unfair situation that Toushiro and other omegas face. He treats Toushiro humanely and gently cares for him through his heat cycles, but unfortunately it turns out that the alpha instinct has been suppressed in his species, and when it begins to come out, it can cause him to lose his control and revert into a beast. Realizing this, Alex and Toushiro both recognize they should go their separate ways, but it's difficult to let go. Trigger warnings: rape of a minor, attempted rape, discrimination, mention of suicide.
Koisuru Neko wa Naderaretai
Kotetsu is a black cat who turned into a human one day (with cat ears and tail), and he used the opportunity to get closer to his favorite worker at a pet store, Okazaki. Only problem is, Kotetsu is extremely shy and Okazaki said he doesn't like black cats! But they still seem to be getting closer day by day. How will Okazaki react when he sees what Kotetsu really is? Cute story, no trigger warnings.
Neko to Spica
Kawamura is just your ordinary office worker who often sees a cat waiting at his doorstep, until one evening he finds a boy in its place. He can't help but take the boy in from the cold, but the boy has no memory or knowledge of the world. Kawamura names him Kuro and lets the boy stay, and Kuro quickly wants to get physical. But when it's revealed that Kuro was the black cat he saw in the first place all along, how is Kawamura going to take it? Includes a side story about fellow cat person, Sheena. Trigger warning: feels like statutory rape.
Bara no Oniwa no Kemono-tachi
Chihana is a college student with two pets: Neko and Inu (cat and dog). Neko belonged to Chihana's grandmother before her death, and Chihana was the one to save him from his loneliness, so Neko loves Chihana. Meanwhile, Inu is in love with Neko, but Neko ignores his affection. But when Chihana's childhood friend suddenly returns and Chihana is very obviously in love, how will his kitty handle the feeling of loss? Very cute, no trigger warnings
Kokou Kemono to Obaka Yankee
Nagi saves a young cat beastman only to get berated by his rude older brother. Turns out, the older brother is in his class and Nagi is pissed. But he can't help but want to help out the cute younger sibling, so he keeps interfering in their lives and grows on Mikejima, until one day Nagi uses some catnip and their relationship changes drastically. Trigger warnings: bullying, noncon.
Playboy Beast
Riku is a black leopard in high school trying to keep it a secret that he's a virgin who hasn't had his first heat. His new roommate Touma is a white lion who doesn't want anything to do with him as he studies his butt off by day and meets with his sex friend to blow off steam by night. When Riku gets his first heat, the two become physically involved for the first time, and even though Riku tries to get a girlfriend and live his ideal high school life, he can't get Touma off his mind. This doesn't have the best story, but it has beautiful art and good smut. Trigger warnings: dubcon, attempted rape, drug, rape.
Neko Neko Honey
Ai has a strange condition passed down in his family in which his sadness causes him to turn into a cat and that's made it hard for him to live a normal life and make friends at school. He's determined to change and live a normal high school life as he starts his first year, but he quickly runs into trouble and is saved by his new desk neighbor, Kurokawa. It feels like Kurokawa keeps seeing embarrassing sides of Ai, but Kurokawa is so kind, Ai badly wants to be his friend, and soon, possibly even more. A very cute comedy BL with some slight translation errors that honestly only add to the charm in my opinion. No trigger warnings.
Kuroko no Basuke dj - Pet ni Koishite Iissu ka
A short doujinshi with a day in the life of a man who adopted a genetically modified cat human (made for sex) who now wants to go outside, so the man distracts the catboy with sex. Trigger warning: feels like statutory rape, sex slavery.
Ninth Life Love