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Artist's commentary
Stark-kun pounds Fern then finishes inside Frieren
As he's making love to Fern, he's shooting a huge load of the thick semen that's been ripening in his balls, full of little swimmers ready to swim inside Fern, into Frieren who's waiting on standby just to be creampied.
Knowing she'll be able to continue their journey will give her peace of mind, right?