This is the first version of Live Action from The Prince of Tennis. Because the type is movie, then there are some scenes that are cut and modified. There are also several characters that have been modified, such as tennis coaches from Seigaku and also his grandchildren. In this movie, the Seigaku's tennis coach is told to be young, so his granddaughter's character becomes the younger sister of Higaki. In essence, there is nothing missing from this movie, the story still takes the theme of tennis and the matches they follow. But in my opinion there are still some casts who look too old to be students.
They're group of childhood friend and there's some case of love between them. One of them died at young age and that makes the group separated into their own ways. 7 years later teir died friends come back and her come back reunited the group.
"Sorry I Love You" is Chinese remake for South Korean drama series "Sorry, I Love You" (2004). Gomen, Aishiteru is the Japanese remake for that same drama series.