Same screenwriter. If you like the family fluff/drama part in Flower of Evil, I think you'll like I Introduce My Father too.

at first it blew my mind that Bride in Sneakers came from the same screenwriter with Flower of Evil, since they have very different tone (serious melodrama/police procedural in FoE vs romcom in BiS), but after I watch BiS in its entirety, I keep finding things reminding me of FoE . The biggest one is the male lead in BiS--his appearance and personality is quite similar to Kim Moojin from FoE. The mention of the FL gets rained when wearing new clothes/shoes. Character digging trash for evidence. Both stories involved bathroom cleaner and taxi driver. Writer used "Gwaenchana saram" (decent person) and "Geojitmal cheoreom" (like a lie) phrase in an unforgettable way in FoE, and as a fan of FoE I can't help but noticing she used the phrase in BiS too.