Can someone help?

Spoilers:














Ok so basically they were like drugged with the tea i think and they r all in like stuck a dream over and over again ( the amnesia is like sometimes real in the dream bc some of the family members pretend they lost their memories but in the real life where they wake up they do not have amnesia)
MC is actually in a coma for 4 years bc MC did not finish the tea that was supposed to put him in the dream
the dream resets i think when someone dies or or someone mention abt the trip or like someone woke up from the dream or remembers the truth or like they have the will to wake up from the dream
sota is MC 's older brother that he had forgotten in the dream, he later on remembers sota tho
grandpas letter was to tell us that he was the one who made them stuck into the dream loop thing bc he wanted all of them to have a memorable trip together
(im actually not rlly sure bc the father also drugged them with the pills to put them in the dream i think bc he wanted to be someone to expect smth out of him and be proud of him afterwards?? I think? The mom also drugged MC with pills after he woke up from his coma, im pretty confused at that part so idk sorry)
theres more plots. For example, the grampa was actually the one with the sickness i forgot what its called and i too lazy to rmbr the rest hehe...
So sorry if i said smth wrong bc i binged read this and my understanding of it might be wrong bc its very confusing but hope this helps tho (￣∇￣")