Happened to Be Immortalized

Aoki (the male protagonist) likes to hang out all day long. No, he forgot to bring an umbrella when it rained and thundered. As a result, he was struck by lightning while running back. Not only did he not die, he didn't even faint. He just... Numbed... From the lightning. An old man came and had to take him to cultivate immortality. Well... Well, it was the first time he encountered such a big scene. He felt that he was a god, and he begged for help in vain. Although he was numb, his bad mouth was still useful, so...