I remember near the end the seme gives the uke money after sleeping with him as a proposal, but the uke misunderstands. Basically earlier in the story the uke explains that giving a ring is special not because of its monetary value but because of what it symbolizes. And the seme doesn't have the time to buy a ring or something like that lol so he gives cash instead.

JK FOUND! its Motomete Yamanai by masao sangatsu 😳