I wonder if there is this kind of story: the ML treats the MC as a substitute (a familiar trope) but the MC is willing to be a substitute, and NOT because he is in love with the ML but because he ISN'T in love. Because of money, or convenience, or he just doesn't want emotional involvement. Anyway, the MC wants to be treated as a substitute and it is the ML who first understands that his feelings for the MC are deeper and the MC isn't a substitute for him anymore. If it's untranslated, I'll be happy, too. But no QT and e-sports.
This is similar, https://www.novelupdates.com/series/a-contractual-marriage-with-the-best-leading-actor/, the MC was dating the ML's brother who ends up engaged to someone else, and the ML needs to marry to get an inheritance.
It's Not Easy To Be A Stand-In is like this but the MC ends up with a better ML. This short untranslated one is I think perfect for your query: 白月光回来后，替身陷入失业危机 (After the white moonlight came back, the substitute fell into an unemployment crisis) by 项瓜绿