If you're looking for manga similar to Level-C, you might like these titles.
Saitou Hikaru wants to travel overseas more than anything, too bad he can't pass the exam that would qualify him for it. Then he trips over the handsome foreigner Leo in a park and takes him home. Leo acts like a young master, but Hikaru can't resist his sweetness. Did Hikaru let a wolf in his house? And who is Leo, really?
University employee Ryouichirou is ordered by the Chairman to take in an exchange student. That exchange student, Qaltaqa, is a native from a developing country who can't understand Japanese!! Though he is a warrior of his tribe and a man of great beauty, seeing him afraid of the phone and the TV, and even the toilet, Ryouichirou gets fed up… But while being called "Ryouichirou" in such a clumsy manner, he has a change of heart!?
Micah Remmington is a serious businessman who will stop at nothing to get what he wants. A shark when it comes to hostile takeovers, Micah has been buying, restructuring and selling hotel chains for years. His next target? —Hotel Kurahashi, a small hotel chain in Japan that’s experiencing financial difficulties. Things soon become complicated when Micah meets and falls for the young president, Yuuki. Yuuki has just succeeded his late father as president; and while he tries hard, he’s really a managerial failure. But is Micah’s infatuation with Yuuki just another ploy to seal the deal without a hitch?
A gay man wakes up naked in the bed of his young coworker after a night of drinking. His sore backside is a clear testament to exactly what happened between them, but he has no memory of the previous evening. Uncertain if his partner is even gay, he has no idea what to do next. Could his long-hidden feelings truly be mutual, or was their night of passion a one-time deal?
Suffering from unrequited love, Todou Tsukasa, also called "the moody pillar", walks into a barbershop. The cheerful barber not only gives him a sexy new haircut, but also advice on how to better carry himself. Tsukasa takes that advice to heart and goes on to fame and success. But he never forgets the barber who helped him when he needed it, and so, he keeps dropping by the barbershop. However, confidence didn't come along with the new haircut nor with the fame and success, and his feelings are neither conveyed nor understood well.
Rei is an AV actor, who finds life for boring. Things are to change though when he meets one of his classmates from middle school.
Due to having to pay the debts of a lover who disappeared Shiki is destined to living in poverty. One night, he discovered a man who had collapsed at the park and since he was worried about him he took him home with him. The collapsed man ended up being Tenma, the extremely famous top model!! Tenma quickly hands the debt collector a large sum of money in front of a surprised Shiki and tells him “Provide service with that body – that I bought!!” and moved into the 1K (1 room + Kitchen) apartment where they started living together. Why is such a famous person living in my apartment…!? Despite being bewilderd Shiki looks after Tenma!?
Santa and Rintarou are what can easily be described as an old married couple. They have been together for a long time and the series explores their day to day life.