Stay the Night (слэш)

Luo Binghe needles Liu Qingge into a duel for the right to sex him up while he's asleep. He uses it for his nefarious and terrible demonic plots of being lowkey sweet while Liu Qingge is too sleepy to resist.
bingliushen established relationship (but poorly established), bingqiu are post-canon married, liushen are tenderly in wuv and dating, and bingliu is just fuckbuddies with definitely no hidden feelings between them, only BICKERING and TORMENTING each other and BEING RIVALS WHO HAVE RIVAL SEX SOMETIMES yes that's definitely what is happening read on for full homo no romo rival sex