Oboreru Omega manga is a popular manga covering Adult, Fantasy, Smut, Yaoi genres. Written by the Cafeko Fujita. 6 chapters have been translated and translations of other chapters are in progress.
Kazuya and Yu are both in the swim club. One day, Kazuya smells and violently reacts to something that shouldn't exist at their school for elite alphas... this is a story about an alpha who is an under-performer and an omega who's an overachiever.