This is pretty good. Has a flavour like "Since I’ve Entered the World of Romantic Comedy Manga, I’ll Do My Best to Make the Losing Heroine Happy", although the MC in this one is a little dense about his feelings for the FC, which is too stereotypical.
I like the general attempt to do things better and improve his family relations too, not just FC focused. I just hope it goes beyond the "will they/won't they" as the end goal for the work and can get them together and tell new stories.