HELP

i forgot the title.. so mc back then was a noble and had a lower title seme (like a servant maybe?) and both of them cherished each other. mc said that one day i will marry the seme because he will be a good alpha, but in fact he became an omega. so the parents are disappointed and kicked the mc. one day, he finally found the seme and saw that he became a higher class and alpha. the seme invites the mc to had a sip of alcohol, but they end up drunk and so on.... btw it has reincarnation, in the current life, mc and the seme became friends and i think they had a swimming hobby...???