<<CONTAIN SPOILERS>>
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The Protagonist's personality has been consistent throughout the novel. Although he is quite immature and extremely easy-going and extremely kind to everyone, there is a certain side of ruthlessness in him when it matters. So I guess that's the benefit you get from this novel. The world-building is fine. Good world-building, good history. Rankings are also good. Overall, it's a good novel.
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Bad--->
But what I would say is, the system given to the main character just disappears for tens of chapters.
Except for the first few chapters, where the mc uses the system with a brain, I loved those chaps. He could help his sister, who was on earth with his system... i liked that.
The development of the main character in terms of strength is unclear.....like.super unclear.
The benefits of the system itself is quite unclear..except for the first few chaps.
You can remove the entire system concept and the novel would be no different in the later parts.
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For example, there is this one power the system gives.... to look into the minds of the heroines (op right??), and the main character does not use it at all.... like fucking at all!!!
And just before a major incident where a whole group of people targets the MC, like basically a day before that major incident, MC suddenly remembers he got some power like this, and looks into the mind of a minor heroine, and well, the next day he is ready for the major incident.
There are inconsistencies like that, inconsistencies in strength, inconsistencies in the use of the system.
And the other thing I would say is, this novel contains a whole lot of overcoming obstacles through friendship and love. You know the One Piece type shit? This novel contains a fuckload of it. I'll give you an example.
The woman who did not accept the love of the main character in his first life, ends up being one of his women later.
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This woman, throughout like 150 chapters, was in love with the protagonist.... like the real protoganist of this world. She broke up the engagement with MC in the first few chaps too....
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So basically, this woman was in love with the protagonist in the initial timeline, fought the MC, and the MC died because of this woman.
In this timeline, aka in the current story progress, this woman, throughout the novel, somehow forgets his love for the protagonist, and ends up being the main character's woman.... tf???
Another spoiler would be, the main character's grandmother attacks him, trying to kill him, because she owes some guy a favor, right? MC forgives her cuz her picture has been framed by his motner's bedside.
Can you fucking believe it?
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I don't know about you, but this is kind of a deal breaker for me, because it's fucking bullshit, right?
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The whole lot of enemies, traitors, ends up being....through friendship, tears, and Naruto-like conversation, turn to the main character's camp.
Other than that, it's an overall good novel. If the MC had a scheming side, this novel would be in ranking.