Here you go: https://www.novelupdates.com/series/ball-boy-tactics/ (Create acc to see link)
Now you do have to wait for a certain amount of time to unlock chapters towards the ending or pay to keep reading like I did. But I do recommend reading still if you want to know what happens next from the manhwa.
It's hard to say because in the novel, this is the part, it's different:
“If you’re going to keep hanging around, why don’t you just become a ball boy, Jiwon? It’d be easier for both of us, don’t you think?”
His tone was sharp, contrasting with his calm demeanor.
It must have been because of what I witnessed behind the basketball court earlier today. I had hoped he wouldn’t recognize me because I was wearing a cap, but it seems he noticed anyway."
Also, I’m just curious. Was the ML a playboy? Or was he just nonchalant with relationships? Because I do not get his attitude, he once said that he would reply immediately if it was his girlfriend but he was not even sad when they broke up? Or was it his first time falling in love when he fell in love with the MC?
he was just nonchalant with relationships! he dated pretty freely but never felt particularly attached to anyone (+ says at one point he has no interest in ever interacting w/ his exes once they split) until he learned about & became drawn to jiwon.
honestly, a lot of his harsher actions / how he comes across can be summarised simply with Internalised Homophobia, it takes him a little while to accept he is in fact interested in a man. once he does though he’s very full force on his feelings because this is the first time he’s been invested in someone, but his earlier way of acting is effectively “there’s no way i’m actually into this guy, surely he’s always around because He wants Me :/“
Novel Spoilers:
If you like ML green flags who are obsessive over their lovers, this book is for you!!! ML falls HARD for the beautiful MC. He breaks up with his GF immediately after and she does not return, just briefly mentioned later on and ofc, MC is hurt/jealous but nothing too serious. They continue to share moments with each other and ends up with a passionate kiss and MC gives ML two weeks to decide if they date (MC said yes! wooo!) After dating, there is smut, not sure if manhwa will include but ooofff, soo good. There is lots of insecurity from MC when dating, he thinks his relationship will end. This makes MC mad, they argue a bit but make up. This happens a few times, but then again, it is MC's first time dating and everything. They don't tell their friends till like 6 months in dating, MC tells them after ML gets angry over an opponent talking to MC like a dog, that was hot lol. Also cute side story, ML wins gold at the Asian games for basketball and gets exempt for military, like MC did for gymnastics. Then later MC, ML and 2 main friends are playing basketball, ML kept giving the ball to MC because he just stood there, with his arms out, reaching for the ball. Lol so cute, it was MC + 1 friend vs ML + 1 friend, they kept getting mad at ML, and he said he couldnt resist, too cute of a face waiting for the ball . (Ending, During basketball interview, they ask ML to write something to open in 10 yrs, he writes he will be married to MC in 10 years and have children who are similar to them