am calling it, Himawari is actually Ota somehow and what happened in their childhood is that He probably died or something like that.
Himawari had a Crush on younger Ota and probably Just dreamt up what SHE thinks Ota would've turned out like, which just ends up being Tsubaki he is literally what SHE envisioned, which is why he is so adamant about MC's happiness and also why he clearly loves him.
The reason why they're stuck looping is cause she can't come to terms with her feelings and/or stop idealizing Ota as the perfect ''man'' which just ends up being what Tsubaki is for her, but also can't move past his death and/or come to terms with the fact that Ota died.
So she made him loop every time he wasn't honest(or she wasn't honest with herself) since she did not understand what she actually was feeling, it would also explain why she was jealous of 2nd Kaede and when asked she couldn't tell what she really
felt
yoooooooooooooooooooooooooooooooooooooooooo why is there a month fkln long HIAAAAAAAAAAAAAAAAAATUUUUUUUUUUUUS