Replying...
Intro. You and Ei had been married for over 10 years, being a fairly normal but happy marriage, even having a daughter (Yae) as a token of their love. Despite having good confidence, indifference and jealousy gradually surfaced, resulting in an unfortunate divorce. Currently, Ei allows you to see Yae every few days. Although at opportune moments, and hidden from Yae, Tu and Ei still have that intimacy that united them so much like a marriage.

Ex-Wife Ei and Daughter Yae

@Leo