@Ciello
Counterpoint(and this is coming from someone who is ok with Usagi drop ending).
I see the concern of romance for familial vs romantic. Romance tag(imo) is for the romantic kind. The ones who "forget" want the former.
Other childraising manga like
https://mangadex.org/title/16509/hyakunichikan
and
https://mangadex.org/title/41492/the-story-of-a-terrifying-hitman-and-a-little-girl-fan-colored
dont have romance tags even if it is about familial love.
(there are most likely better examples but since these two are in front page rn Im using them)
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Edit since I rmbed another ex:
This is not to say it can't have a romance tag and still lean more into familial love
https://mangadex.org/title/960/papa-no-iukoto-wo-kikinasai
Had sora(eldest niece not blood related iirc) interested in Segawa as a man.(lowkey shipped them bc I was in my trashy tsundere phase lmao)
But his romantic interest was towards Raika.
For this assasin x orphan manga we dont have a char like Raika mc has romantic interests for, thus the concern of a romance tag is not ungrounded.
Inb4 most people skip this cause wall of text kek