Anata to Senya Ichiyaあなたと千夜一夜 ; 千夜一夜 ; 1001 Nights with You ; One Thousand and One Nights with You

From HotCakes: The man super-uptight office worker Ooizumi Sonoko got drunk and spent the night with shows up at her work and turns out to be the section chief?! A hilarious romantic comedy about pure love wrapped in indecency. This series was published as part of vol 2 - 5 in Oboretai and the first 3 chapters(done by ShoujoMagic) can be found in vol 2.