Conan and KID takedown the black organization together
Kaito got heavily injured in the takedown and being in coma for a while
Shinichi, who had gotten back his body, always visit him and talk to him despite knowing no one would reply
Kaito wake up and get depress when the doctor said he cannot walk like before but he can be better if he undergo therapy
Kaito snapped at Shinichi, telling how he doesnt understand his pain and all
Shinichi support him throughout everything especially when Kaito talk with Aoko about everything
They spend their time together and Kaito can walk by his own slowly now
One day Shinichi asked Kaito "Hey, Kaito. If I die, what would you do?" and he just laughed at Kaito's stunned face and walked away.
The truth is, unknown to Kaito, Shinichi is slowly dying and before he died, he left a letter for Kaito. In the letter there is something like 'I lied. I don't like you as friend. I like you more than that. I love you, Kuroba Kaito.'
and thatsss ittt. tbh this idea came up after I read Of the sun, the moon and the truth by sleepy_aconite on ao3 and I suddenly remembered your lie in april pftt sooo gah i wanna do this one so bad because it is somehow angsty hehehhe