To Sir, Without Love: I'm Divorcing You, Vol. 4 (manga)

The deadline for Byletta and Arnald s wager draws ever closer. While Arnald grapples with the thought of losing his wife, the latter still can t quite put her feelings in order. Byletta longs for the day of sweet victory where she intends to shove the letter of divorce right into that smug husband of hers...but why does she feel a touch of loneliness at the thought of bidding farewell...?