Its a rarity to see an accepting parent in a yuri manga, its even rarer to see a supporting one who tries to get their gay daughter a date.
That could be it, but then again, he could just be glad his socially awkward daughter has a friend, and also understands that his daughter is, well, socially awkward. He was also over the top happy when he first found out Koyuki's club would get a new member, without knowing almost anything about Amano back then. Even without the whole blatant gayness, it is obvious Honami does not make friends easily, and for that matter I do not think she even has any beyond Amano. Gay or no gay, of course he would be supportive.
last edited at May 17, 2018 2:20PM