If you loved Boku wa imouto ni koi wo suru, try A Flower Aflame
Un pont entre un film que tu as déjà vu et un que peu de gens ont croisé. Voici ce qu'ils partagent, et ce que le second fait que le premier ne fait pas.
Ce qu'ils partagent
Both films are directed by Hiroshi Ando, and they both carry the bittersweet, tender mood tags, and they sit in Drama / Romance territory. If that's the register that drew you to Boku wa imouto ni koi wo suru, the second film will land in a comparable space — through a different lens.
bittersweettender
What A Flower Aflame is
Sonoko dutifully marries Amamiya only to find affection in short supply until a move for his job plants an unwise crush in her lap. Her new paramour happens to run the company. Someone really should have supervised the HR onboarding.
Ask 
ChatGPT
Claude
Grok
Le Chat
Perplexity
for a deeper bridge
ChatGPTClaudeGrokLe ChatPerplexity