Gays r da best's manga / #Co workers(1)

Both stories are focused on adult males and how they handle work and love life as gays. First couple is an uke who have only dated guys who r older (he mostly doesn't realize that some r just using him to cheat) and a seme who's younger and very sweet and sincere. Second couple are senpai-kohai relationship and the trope is enemies to lovers... uke's sister has a debt and then uke sold his body (he doesn't hate it) and seme who bought him for the night