From Sidekick to Bigshot - Chapter 1454

Dorian was out celebrating his college graduation when a car slammed into him, and darkness took hold.

After a god screws up and accidentally takes high schooler Shou’s life, he offers him reincarnation with a gift to make up for it. Shou asks to retain all his old memories for the new life. Shou is reborn as Will, a noble’s son in a world where magic use is common and involves knowledge of kanji characters. With all his memories, he’s a brilliant toddler, and when he experiments with magic, he finds that he has an amazing talent for it! What’s more, though he was smart but unloved in his old life, in his new life he has a mother and a father who both love him deeply. His future as Will is looking very bright and cool!

There is luster in the east, and it is named Dahuang. “
In the rumors, ignorance, poverty, backwardness, and wildness. “
– bullshit. “
Queen of the Great Desolation, cold as frost. “
Supported by the national teacher, and the golden boy and jade girl of the national teacher, they are deeply in love, a stunning couple, and unparalleled. “
– bullshit. “
The queen died suddenly, and the national teacher mourned. According to the instructions of heaven, they traveled thousands of miles and finally found their reincarnated lover. From then on, the prince and princess lived happily in the castle…
——Crap! “

- Description from novelbuddy

I became the childhood friend of the protagonist in a novel. The childhood friend who died from taking drugs.