in queer spaces, especially in countries where gay marriage is illegal its a common custom to adopt your partner to gain same rights as in a marriage, like guardian for emergency, property and other stuff, adopting the kid wouldnt have given them the benefits.
I'm not sure but in Korea there's no legal gay marriage. Since they can't get married beom adopted ho so that ho can get registered under his(beom's) family. Since marriage means welcoming the bride in husband's family, this is the least that gay ppl can do. Since it's the same as welcoming ur partner. Also ho is an orphan so it makes more sense. And beom wanted ho to have someone besides seol to call his family
im sorry but i gen want to ask why did beom choose to adopt ho instead of sol (the kid)? im a lil confused since i thought he wanted to adopt the kid so both of them can be the father like a couple idk pls enlighten me