1st Arc
MC dies and meets god, there he got a certain amount of points to create his build. He could chose options like Hero, which spend a lot of points, or get Carrier which spends nothing, but he uses these points to get a couple skills such as being able to learn any skill (through hard work) and a few growth values (since Carriers have almost everything at E). You can see that in the 1st chapter, on page 7, the comparison between Carrier and Hero.
MC is the first son, the heir of his family, he is considered a genius because he works hard, and is able to learn everything. However, he knows his job will be Carrier, meaning he knows he will be exiled in the future, so he does his best to learn everything as much as he can.
He has a younger sister who is pretty much a brocon, while he did his best to be a decent swordsman, he noticed his sister took a sword, and was almost besting him each time. Pretty much all maids on the mansion are his father's concubines, and are essentially hired after giving birth to a child, and that child is taken from them to act fro the family. Since MC is the heir, his is taught from VERY EARLY on to have sex with women, but the sex in this world (or at least with his father), is pretty bland, so MC's first partner, who would also act as his maid, and had already given birth to a child she has never met, had her first orgasm with MC, she would teach him magic, and he would get another maid as partner who had the Assassin job, whom he also asked to teach him Assassin/Thief skills.
Then there is a princess who is younger and has pretty strong magic ability, she tries to appraise MC but he resists, from there she gets pretty attached to him, and they get engaged. A monster breaks and arrives at their territory, but MC, although he almost dies, saves the princess, and is later rewarded as a hero, along with another girl who has a real Hero job.
MC's sister and the princess do not get along well.
But when MC gets old enough for the job ceremony, he gets the Carrier job.
There is a belief that Jobs are hereditary, hence getting a Carrier job is equivalent to tarnishing the ancestors of the family. MC wasn't sure what would happen to him, he was isolated in the mansion, and he knew there was a risk of him being assassinated, he still tried his best to train his new abilities. He made a huge bet, and was able to get a thief gang to act on the day he was "exiled", although he found out at the moment that he was also being assassinated by none other than the butler, but he was able to survive thanks to the mixed attack, and he got Exp from those who did not die but were in a terrible state.
That's the image you see on Page 10 with the butler.
Of course, MC is declared dead, so the little sister becomes the new heir, and the princess is also not accepting it, specially after hearing rumors that he got the Carrier job, so she guesses what really happened.
2nd Arc
He changes his name to Sei, and starts acting as an adventurer.
Do not misunderstand Carriers as discriminated people. Although they have the weakest growth potential and no combat ability, Carriers even have their own guild, and if a party lets a Carrier get killed, they may be punished to being unable to hire any other carrier, which means the losses are large. However, Carriers also can't do much by themselves.
Sei uses he learned abilities to get through and tough, he uses what he learned with Magic to improve his Mana, and that caused his item box to increase exponentially.
MC is unsure of what to do, and goes to brothels to pass timme. He takes on the beast girls, who are usually undesired (because they have beastly features), mainly because they are cheaper. I can't remember much of the arc, this is the one where he learns the ropes from adventuring, there are two strong parties, one doing shady stuff, and another super friendly... But the leaders are gay and are only nice expecting your ass in return.
MC helps some newbie adventurers, and is able to get rid of the shady adventurer. He also got a ton of a special honey with him, that he later uses as alchemy ingredients (remember Scarlet saying the Mana potion tasted super good?)
And in regards to the prostitutes, there is one cat girl who used to be super timid because she had been violated by a rough adventurer (or something like that), and Sei helps her. She wants to be with him, but he says he has no plans of staying in a single place, so she starts adventuring. He promises to one day return and have her join his party.
He then moves somewhere else.
3rd Arc
He saves a girl that gets ran over by a noble female Knight, and gets acquainted with her widow mother, and he gets a place to stay too (and yeah, although the girl is super into Sei, he does the mother instead). He is looking to learn Alchemy (thanks to his learn anything skill), but finds out that alchemists would help him... But the woman is an alchemist herself, so she helps him.
There he also gets acquainted with the deputy of the knight battalion, apologizing for what happened, and he also helped Sei. In short, the female Knight is strong, but she is extremely proud. It's kinda like "I already have the hard job of defending the commoners, they have accept whatever we want". Because Sei ends up as the Carrier with the largest item box, the deputy knight pleads him to join their expedition into the dungeon, this is because the female knight wants to carry too much stuff, like clothes, bed, all the shit, and the carrier guild already refused them for prior bad behavior of hers. Sei ends up accepting the task for his sake.
This happen, there is a Prince who is her fiancee, and he rapes the noble girl, completely humiliating her. The prince is gay and is surrounded by his lovers, but he understand he has to do nasty stuff for the sake of having children, but that's all this is about. Noble girl breaks and Sei gets his chance. He ends up leaving, but she tells him that if he ever needs help or support, he can count on her.
The deputy knight was also someone who was interested in the woman Sei had been banging all this time, so he kinda connects them finally, now the woman has someone else to have sex with.
4th arc
He has to move out again, and he meets this strange noble girl who enters a super dangerous forest, he tries to warn her, and even almost dies from the really strong enemies, but to his surprise, she one-sidely kills everyone. She has a Knight Job, and is actually super high leveled. Can't remember the details, but her father tells her to go to the forest and cull the monsters there, expecting her to die, but she doesn't, so she keeps going back, and she only gets stronger.
MC ends up falling in love with her, and she reciprocates, they do everything together, but she follows her "duty" of culling down the forest, and he tells her to leave, kinda like he did.
There is a dungeon in the city, but nobody can find the path to the lower floors which was lost in time, so there is kinda like a gold rush among adventurers to find it. Sei maps the entire place, searching for hidden passages, and eventually finds it. He tells the girl they should do it together, if they clear it, she should be able to finally clear her name and be able to leave her family, and she accepts.
They get to the lowest level, but she dies to the boss. Sei is completely broken.
As can be seen, Sei is unable to have any long term girl close to him, and now, he starts too feel undeserving, that includes with Zoffy and Scarlet leaves him.
