Theme(s): Romance, cute, fluff, comedy
Character(s): Bang Yongguk/BAP/Male OCS/Male Idols and Girl OC/can substitute a female idol
Notes: Yongguk was dead but she was chasing the girl in the MV.
Cr: TS ENT

Theme(s): Romance, cute, fluff
Character(s): Myungsoo/Male OC, Dasom/Girl OC, Female Kid and Random Dudes, LOL! I think L works for them as a Personal Assistant.
Notes: There is a lot of footage of the Ferris Wheel. 
Cr: Starship TV

Theme(s): Romance, cute, fluff
Character(s): Juniel/Girl OC, Aleyna and Daniel (Ulzzang Kids), Male OC/you can substitute a male idol
Notes: I was also finding a clip of this two ulzzang kids, FINALLY!
Cr: OfficialJUNIEL