Lan Wangji has a fantasy. Wei Wuxian gets several clues.

"Zewu-Jun. You once told me about a house surrounded by gentians, where you visited once a month, and how Lan Zhan still waited there, even when the door no longer opened." Xichen feels light-headed. He feels shocked, and angry. He has never told anyone such a thing, but Lan Zhan is giving Xichen a look of utter betrayal. "You told him?" Lan Zhan whispers. "When?" Wei Wuxian takes Lan Zhan's hand. "About twenty years from now." Wei Wuxian starts again from the beginning.

“You know, you’re the one to beat this year,” Jiang Cheng offers helpfully, having seen the glare from right next to him. “Hanguang-jun’s been through juniors with the rest of us, he knows all of our tics. You’re an unknown variable, since he’s never competed against you before.” “Thanks,” says Wei Wuxian drily. “That’s very comforting.” Or: five nighthunting competitions where Wei Wuxian and Lan Wangji were rivals, and one where they weren't.

‘Don’t indulge in pleasure,’ was perfectly comprehensible - at fourteen Lan Wangji already knew that that meant no second helping of stew, even if you were still hungry, and definitely no more little cakes, your mother should never have made those for you to try in the first place. - Or Five Times Lan Wangji learnt something about sex

Lan Wangji discovers a kink. Wei Wuxian narrowly avoids discovering Lan Wangji's kink.

Wei Ying was sprawled on the floor in front of the oscillating fan when Lan Zhan got home from work.

Wei Ying might be an alpha but that doesn't mean she doesn't want to get fucked and knotted sometimes, okay? So, after buying herself a knotting dildo, she sets out to make her dreams come true. Unfortunately, the dildo gets a little... stuck... Luckily, her roommate, Lan Zhan, is home to lend a helping hand!