Tennen Juhun Sugar Baby summary:

Kouji and Ryuudai are two gay one-night-standers who have the same interests and who attend the same university. Ryuudai is always stealing catches from under Kouji's nose, but one day, Kouji is the first to meet a mysterious, clumsy store employee who puts his condoms in the microwave along with his lunch. Kouji takes an instant liking to him,and won't let him get away! He makes a pass, which is accepted. But then, Kaoru takes him to a luxurious apartment he can't possibly afford on his $10-an-hour wage... But when Kouji tries to distance himself from Kaoru, having learned his true identity, Ryuudai enters the picture... A strategic game of love between a scary-hot student with low self-esteem, a graduate student who has a doctrine of free love-making, and a fluffy, slutty, wealthy boy!