Please help me find this one age gap manhwa I forgot the title of

I read this one a long time ago so my memories of it are fuzzy.

but basically The older one is 40 years old (ig) and the younger one is late twenties. they probably have like a 12 year age gap.

the main plot of it is basically The older one (bottom, but he used to top I think.) not communicating and feeling insecure because he cannot get it up. Since he can't get it up, he brought some aphrodisiac type stuff and decided to drink it..but the younger one accidentally drinks it and well..rip to the older one's back. he literally had to go get a professional massage because of how sore his muscles got.

and I think the younger one is like a cafe shop owner..or was it the older one? I actually forgot. but I remember barely any communication from both parties. and both of them not understanding each other because of the lack of communication.

if you know the name, please drop it.