you

calling all fujos to find me this bl manhwa i read years ago.
all i remember is the main couple had an age gap, a uni student and a retired(?) teacher(?). the older one needed help from the younger one so he went to a pc room to find him. at this stage they werent close so the younger one refused to help him and continued to grind on the game. the younger one was stuck on the game, either he couldnt rank up or couldnt pass a level idk. the older one previously played the game during his student years and was top level. he offered to help him with the game in exchange for his help so the younger one accepted.
that is all, pls someone help find this ╥﹏╥

ive been trying to find this regression manhwa, during her first life the fl worked hard and goes back to the past and wants to live life leisurely and starts to teach her younger(?) brother and the ml swordmanship. i think she had white hair ???