The Music of Love Begins in the World of If

I gathered the video links of the opening and ending song. 

OP song is not out yet but a preview has been posted:
OP song by 時速36km called ''Around I'' ->

https://www.youtube.com/watch?v=fmfgAiWGDzU

Ending song by UNFAIR RULE called Umio/内緒 -> 

https://www.youtube.com/watch?v=yTqD9H6KaEY