So Mc defeated a dragon a few years ago yet still doubted he can become an E-rank? Also he studied a lot to become a receptionist so he should be able to use his brain but still makes decisions based on what others say...
@Supcolors
To be fair, it's sort of like Naruto's super rasengan that he got later on. Sure it'll obliterate the enemy, but it'll also obliterate you. That's why, like Blowstone said in one of the earlier chapters (I'm not going back to find it, you can't make me), he said they had banned the skill. I'm assuming it'll come up later in the series (I've only read the chapters I've translated btw), but for your everyday stuff...
isekai'd saitama...
you know, when i read that page when he killed dragon with a single punch, i heard "one puuuuuuuuunchhhhh" from opening one punch man S1 in my head
Also, to be fair, he was beat past the point of death and revived over and over again while being told he's weaker than an E rank. I mean, isn't this technically a form of gaslighting?