"Okaeri, Papa"

If you found something weird, blame it all to yandere.

How did she know her phone password, because she is a yandere and had been monitoring her and her family situation. How she know her classmate is meeting with her dad that night? Because this mother and daughter had been planting bug on her and know her position from gps, that's yandere for you.

How did she know her dad's sister has trouble with her husband? Because this pair already collected all information about the MC's family months before meet them. Yes, yandere is well prepared! They planted bug on everyone to know everything, yay!

All of those above are just some guess to reason everything that are unexplained, but it doesn't look far from the truth, ahem.

For example, fhapter 10, how did the phone b3come unlocked. There was barely anytime for the girl to open it but it somehow got open lol

What can i say.... It's hella interesting looking at sociopaths dealing with life.
There is a minor mysterious sub-plot going on with the protagonist's past life,

It is heavily implied something happened with her biological father/family,which only add more spiciness to the mix.
It's a series with tremendous potential to be able to pick up and expand over the best quirks of others trendy psychological series such as "Chi no Wadachi" or "Boy's Abyss".
I hope this one will develop in a better way, making the right decision and disposing of any unnecessary repetitive drama, looking for a short, solid and better psychological manga.

Finally a treasure, yes, I like this.

Well, realistically speaking, the situation is rather horrifying for the dad, but whatever, I have been looking for good stuff like this. Call me warped. I don't care.

Before you guys think of dropping this manga because of the content, I genuinely ask that you give it a chance. Overall, the only one trying to ruin the marriage and family relationship is the daughter alone. She's the actual creep in the story. The father is just genuinely uncomfy all the time. Truly horrifying.