The story starts after the honeymoon phase has cracked. We see Mikoto noticing Kikuchi’s lack of reaction during a crisis. We see her frustration when Kaz assumes his loud love is enough to override her need for stability. This is not a "falling in love" story; it is a "staying in love (or leaving)" story.
The manga doesn't paint either partner as a villain; instead, it highlights the human tendency to be selfish or complacent. It captures the "exhaustion" of love—those moments where you wonder if the effort is worth the reward—making the characters feel like real people rather than tropes. The Art of Subtle Emotion manga soredemo ashita mo kareshi ga ii
If you Googled "manga soredemo ashita mo kareshi ga ii" , you are likely asking: The story starts after the honeymoon phase has cracked