Follow The Bread Crumbs
I'm not a big fan of age gap stories like this one, where the older party got to know their future love interest when they were just a child, raising them and such. It just reeks to much of child molestation and/or grooming, even if nothing happens before the child reaches adulthood. But it's still kinda cute, kinda funny. The characters are adorable. So, yeah... I'm ambivalent.
The Tyrant’s Guardian is an Evil Witch
I really like this story so far. The tsundere MC is hilarious and I love the relationship and interactions between the characters. I find it a bit unnecessary to have made Celeste a reincarnator, though. She acts like the queen and not at all as a "regular 20 year old Korean woman". I get that she's been a witch 10 times longer and that could've altered her personality, but then shouldn't her memories of her time in our world be less clear/important? Imo it seemed like a pointless attempt of following the isekai/reincarnated-into-a-novel trope. It clashes with the otherwise brilliant concept of the MC's personality and could've been explained in a much better way. It is a fantasy world, after all. And she's a witch. Prophetic dreams, magic crystal balls, enchanted books; It could've been explained in countless other ways that do not involve reincarnation... It still like it though, so I'll try to overlook that minor annoying detail and enjoy the story regardless.
The Investigator of Mueller