Read the novel review on novelupdates.
And also LET's SAY HIPI YAY YE on another weak/herbivore MC.
Let's praise the "originality" of keeping their relationship a "secret" it's not like every modern manga does the same thing....right?
Quite an odd concept. Yes, they are step-siblings, yes, they are dating, and yes, they are trying to keep it all hidden... But what's with the feeding angle? Is this the USP that got it published? We have lots of hidden brocon relationships, but hey, he feeds her!!!!