Can someone recommend me something very similar or has the same vibe as Unromantic?

https://www.mangago.zone/read-manga/off_track_crush/
Short and sweet (◡ ω ◡)

Try these
https://www.mangago.zone/read-manga/minmotion_syndrome/

https://www.mangago.zone/read-manga/love_shuttle/

https://www.mangago.zone/read-manga/dear_benjamin/

https://www.mangago.zone/read-manga/wet_sand/

https://www.mangago.zone/read-manga/under_the_green_light/

https://www.mangago.zone/read-manga/will_you_subscribe/ Story 2 chapter 50

https://www.mangago.zone/read-manga/liveta/

https://www.mangago.zone/read-manga/smyrna_capri/

https://www.mangago.zone/read-manga/enthusiasm/