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Nintendo added lesbian sex to Splatoon
(hexbear.net)
Tabletop, DnD, board games, and minecraft. Also Animal Crossing.
3rd International Volunteer Brigade (Hexbear gaming discord)
Rules
I think I get what you mean, but I wouldn't even say it counts as "undertones". It feels more like it's just the point
Marina's diaries where she keeps using heart emojis when talking about Pearl
Marina's wallpaper being this picture of Pearl wearing both of their jewelery
Marina seemingly getting jealous of Acht when she thinks they're hitting on Pearl (which is somehow queer no matter how you interpret it)
This actual shoujo manga Marina made with a love letter to Pearl shown
and there's still somehow way more than this in-game. Nintendo is barely holding back