Lugia runs the details down of their relationship. Throwing in teases here and there. See Lugia, to put it bluntly, is a total bottom slut. His time in the open fields has him bored and being stalked by Leo got the large Legendary's interest.
Sure, he's not going to eat him as mentioned, and his cock certainly can't fit in Leo. So his options are pretty limited. But we'll later find out that Lugia loves to watch the happenings of others. The sexual interactions in particular. Quite the voyeur dragon-bird.
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