Sadly, I must inform you all that shonen romances in 2020 can still be pretty dire, if today's review is any indication.
RENT-A-GIRLFRIEND (Kanoji, Okarishimasu), by Reiji Miyajima. First published in 2017 and first published in North America in 2020.
PLOT:
Kazaya only intended to use the rental girlfriend service once. He hoped it would help him get over his first girlfriend, who had just dumped him after a month. He was matched up with the charming and lovely Chizuru, only to be infuriated by what he sees as her giving people a false front and a false sense of hope. She privately chews him out for his hypocrisy and things might have ended there if not for a chance encounter on campus and their grandmothers getting the wrong idea about them. Now they have to keep up this pretense of a relationship for their sake, and the lines between rental girlfriend and real girlfriend start to blur.