Okay so bare with me, but this is a yaoi manga that I haven’t read and finished in a couple of years .. but suddenly just thought about it! I’m not sure if there are other stories in it, but this particular one is about a male character who despises the male pottery / ceramics artist because of his flirty attitude, but over time they’ve come to understand one another and the male falls in love with him and I think they made a promise to each other for a “special night”? An accident like a landslide caused the pottery artist to lose his memory of the time they’ve spent hanging and talking with each other !

Kachou Fuugetsu by Shimizu Yuki.