Both movies are quirky and sarcastic, and they feature weirdo MLs that work in a place that looks innocent on a surface (laundry, bathhouse) but is, in fact, involved in crime.

Both productions use non-linear storytelling where the past and the future, human and ghost become intertwined

Main characters in both movies face a similar problem with their identity and possess memories they should not have

Both female leads have a similar way of courting male leads but their actions have different outcomes

Wen Shu Pei's style of directing in Are you Lonesome Tonight? is very similar to Diao Yi Nan's in Wild Goose Lake

Both dramas are quite similar, have similar themes and the plot in both Risky and Kamen Dosokai follows almost the same pattern.

Both Our Little Sister and the first episode of Arimura Kasumi no Satsukyu were directed by Hirokazu Koreeda, and both deal with similar subjects

Both productions have similar plots that focus on teenagers, their friendship and their hardships; they both star Teresa Daley as one of major female characters too.

Both productions are set in the same "universe" with Guan Hong Feng (ML in Day and Night) being a supporting/guest character in Reborn.

Lives of male leads in both productions get changed due to movies during the tumultuous period in communist China.

Both productions star Zhang Yi as ML who befriends a teenage girl he once had an enemy-like relationship with.

Similar premise - in Don't Touch Me, Your Majesty ML time travels and has to cross-dress as a concubine, while in Nobleman Ryu's Wedding ML has to cross-dress and become a stand-in for his sister. Both have extremely low budgets, but Don't Touch Me, Your Majesty is a parody, while Nobleman Ryu's Wedding is (slightly) more serious.