Trying to find a manga I read in 2018

It's a Shoujo manga. It was about a blonde (?) 17 year old girl who has a black haired ex boyfriend her age who is still in love with her. I remember at the very beginning of the manga they were in a theater (?) they were arguing and he forcefully kissed her.

This girl meets a 15 year old blonde guy who plays basketball (?). They hit it off but aren't dating. In one chapter she prepared lemon slices for him but he didn't get to try them because the other players ate them.

Some time by the end of the manga she gets amnesia after almost falling from the rooftop of a building. The only memories that got erased were the entirety of the time she spent with the 15 year old. More time passes by (2 years?) the 15 year old is now 17 and he got into an accident involving fire which altered his voice. To make the girl remember him she needs to hear his voice but because it's not the same after the accident she doesn't, so now they have to recreate the falling incident from the rooftop to get her memories back.