It's not an easy answer cause NigeHaji had a very special taste we barely find in other japanese rom coms.
I would suggest the following ones :
-Densha otoko,
- Koe Koi
- Date : Koi to wa donna mono kashira
- Dokushin Kizoku
- Hotaru no hikari
- Sekai ichi muzukashii koi (cute would not be the right term, but awkward for sure)
or maybe any Kimura Takuya romance drama
as for movies :
- blindly in love, with Hoshino Gen as the male lead, the story is similar to Nigeru...
- kimi ni todoke