The Kyogokus' Wedding Night

Synopsis

"Can you not learn to love me?" Seishirou Kyougoku, son and personal secretary of the incumbent Minister of Justice, is now living the newlywed life with his just-for-show husband Takeru Kyougoku and his young half-brother Reo. However, being the honest and diligent man he is, Seishirou can't shake his guilt over dragging them all into this farce of a marriage. Despite his best intentions, he grows more and more despondent as time passes. That's when Takeru tells him not to worry because everything will turn out fine if they just turn their sham marriage into a real one... How exactly is love born? (Source: MangaPlaza)

Anime adaptations