If you're looking for manga similar to The Retired Hero, you might like these titles.
Mino’s just like any other cat on the streets, except he’s got a secret… He’s actually a rare musk cat, and on top of that, he’s an omega. Mino hides his heats with as much suppressants he can get his paws on. If anyone found out his secret and just how much he’s worth, he could get in some serious trouble. But one day, a mysterious cat named Yiho prances into his life. Yiho’s so handsome and he smells better than any other cat Mino’s met, but he’s also got so much to hide…
A mutt named Black falls in love with a Japanese spitz named Blanc in a dog cafe! Despite being of different pedigree and both male dogs, Black persists with his love attack towards Blanc...... It's a heartwarming story about humanized dogs!
Office-worker Inukai-kun’s boyfriend, Kentarou-san, is an anthro dog who's gruff and stoic looking. He can’t hide his tail wagging like a puppy, even with the stern look on his face… Together with their coworker Nekomiya-kun and his feline boyfriend Shimada-san, they are both lovey-dovey with each other every day!
Are people really defined by their blood types? A, B, AB and O-Type are here to set things straight. Whether they're trying to cross a bridge, sharing their hearts or meeting aliens, the four blood types continue to prove – or disprove – popular theories about themselves. Does B-Type like rules to be broken, is A-Type cautious and naïve, and is O-Type a peacemaker?
Being abused by his stepfather as a child, Kim U Hyeon developed a trauma and hatred of men and started going out with them to understand himself, his hate for males grew except for one person, his former senior in the army Bak Jong Seo.