https://www.mangago.zone/read-manga/shitto_wa_ai_o_kumoraseru/ kinda sounds similar to this one though i might be wrong (don't really remember the journal part)!!
Sorry this is not it. It was a full coloured manhwa and came out recently.
Thanks for your rec though.
Swore to myself I remembered this story and had some images in an album. I was correct. Took me a moment tho
https://www.mangago.zone/read-manga/incidentally_dyed_by_spring_s_love/
is this it? https://www.mangago.zone/read-manga/reunion/
Yesss, this is it!! Thank you so much guys
So I'm looking for yaoi where they meet in school over Piano and later seme moves to abroad. At the same time, uke quits school and works in a hotel (owned by seme ofc). They meet after 10 years and reunite.
Also there was this journal thingy which gets misplaced.