This is just my personal opinion.. so dont bother.
i just finished reading this from chapter 1 to the latest (currently chapte 7.3) straight without stop.
The good thing about reading it straight is you still can get the feeling and mood from previous chapter. And also the story will be fresh to see.
So here we go;
• The character in this Manga to be honest is totally plain, or rather than saying it "MC" ,is more fit to called him "Side character".
The MC doesn't have any remark other than "Siscon" and "I can save everyone (typical naive protagonist)". The MC doesn't have a good value to really grab my attention.
•The story itself is not that bad, but didn't close enough to be "good". Honestly if you really look into it, other than selling "Sympathy" and "Morality" to grab people attention this manga almost have none to work with. (well there is still "Story Starter pack/bundle")
•The power system is quite.... ehhmmmm.. what to say.. well it quite weird or bizarre.
Apparently it is using a "Shell" as an indicator. It is like mana that always active to protect the external body. mostly the skill need to cost "Shell" as a core power. And to blatantly say that this Author is to fucking lazy to come up with something and just put someshit but he make it look different from other manga system power, but with poor quality than other.
• The world building itself is only about spreading gossip and information about he love his sister.. I didn't really mind reading Siscon, harem, or someshit like that. but at least do it with smart play, and not idioticly spread it wherever he goes or meet someone, atleast keep it for yourself or people who really close enough.
• Lastly what make me dissapointed is the MC itself, he feels like people who lacks ambition or goals, even though he said that his main goal was to cure his sister. He feels like a puppet who got dragged wherever the flows bring him. I feel it since the scene where he got kicked from Hero party, his action is so pathetic, i mean stupid and retarded.
But, well yeah.. whatever, people have their own opinion