Mad na α wa Marmot ni Koi wo Suru

Genjirou Momoyama is a poor and unpopular omega, and suppressants don't work on him. Every time his heat comes, he has to go to an omega shelter, and it's tough. Touji Sakurada, a high-end alpha who owns a leading pharmaceutical company in the development of suppressants, falls in love at first sight with Genjirou as his "clinical trial subject." Genjirou, tempted by the reward, agrees to be Sakurada's subject, but starts getting tired of Sakurada's research and constant monitoring...! An omegaverse romance comedy starring a rich alpha who wants to save omegas and a poor, big, unpopular, and non-standard omega is here!!

(Source: Renta!)

Note: Includes one extra chapter.