I'm a Water Monster at the Bottom of Loch Ness

Recently, that human has been bothering and pestering me again. I'm so troubled. I told Grandpa Tree in all seriousness that my standards aren't high. At the very least, it has to be one of my kind. Grandpa Tree said that, except for me, the entire plesiosaur clan went extinct more than a hundred million years ago. I insisted that if plesiosaurs had ever existed in this world, every other species would be settling for second best, and I refuse to settle. Grandpa Tree sighed deeply. "You've been single for over a hundred million years! What would be so bad about settling a little?" I replied, "Even if I settled, reproductive barriers can't be overcome. A marriage that isn't for the purpose of reproduction is just hooliganism." As we talked, that human suddenly popped out from behind Grandpa Tree. Disheveled and bloodshot-eyed, he tugged at his hair and wailed at me: "Oh~ oh, ooh ooh~ eh-ugh, oh~???!!!" I sighed. "Speak like a normal person. I can understand you, actually." Theme: