Hmmm.. I see it's a slow-burning healing romance type. So he will fall for her but in their highschool days huh.

So is this a misunderstanding? Like he caught his wife cheating but nothing was a misunderstanding, that she needed somewhere to stay, and chose the love hotel and he caught them in a brim, and decided to commit suicide. That looks like it.

主人公の元妻への新発見の点から等、タイムリープがキッカケで少し事象が変わるのか？続きがとても楽しみです(*´ω｀*)

彼女居ますか？　は　彼氏居ますか？　の間違いではないでしょうか？