Themes could include moving on from past relationships, the importance of communication in the current one, and finding value in what you have rather than idealizing what might be.
Hana approaches Sho, her voice steady. “Let’s make tomorrow a work in progress, just like this.” Their conversation is cut short by the crowd, but the unsaid promise lingers. The chapter closes with Sho nervously adding a new line to his mural: “To Hana, who makes every blank canvas feel magical.” manga soredemo ashita mo kareshi ga ii chapter 12 top
Hmm, maybe it's a story where the main character is dealing with the idea that even if their current situation isn't perfect, maybe the future relationship (the boyfriend in the future) will be good. The "chapter 12 top" part might refer to the specific point in the manga where this development happens. Themes could include moving on from past relationships,