Can anyone tell me the title of a manga that when the uke forgot about his lover but his l...

Can anyone tell me the title of a manga that when the uke forgot about his lover but his lover know him a lot. For what i remember they have a part that they s*x in the day of the festival and when they're dOne the seme gives him an apple candy or gold fish ( arrgghh! That's what i remember sorry) and the last story that i know is when the seme thought what if the uke remember him? can the uKe leave him alone?. because i think they have a promise to each other. And the other day their neighbors ask them if they're related to each other then the seme said they're cousins (i think that's what the seme said).
Please can anyone guess i know that my explanation is kinda confusing to know right uwaaahhh huhu i hope you'll understand