I saw you had all the Trigun stuff, but not the recent reboot, Trigun Stampede.
Aharen is Indecipherable and Tomo-chan is a Girl are fun RomCom shows.
Golden Kamuy isn’t on your list, but it’s one of my all time favorites that I’ll always recommend.
I’ll agree with OP on Summertime Render and Days at the Breakwater as well!
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If we’re counting continued in the 20s: