"As Lincoln goes on an underwater expedtition trip with Serena, as she wears her indigo seashell bra so that Lincoln wouldn't be distracted by her "top looks", she borrowed a mer serum from Noira that would turn humans into merfolk as Lincoln drinks it to become one so he would swim faster, become stronger, and can go deeper into the detphs with Serena."
Sometime during the exploration...
Lincoln: Well Serena, I want to say that I wanna stay here with you forever.
Serena: What!?
Lincoln: Well every since the kingdom was saved, I developed feelings for you.
Serena: You have?
Lincoln: Yes and the truth is that the reason why I blushed was because you are a really cute girl.
*Serena blushes at that*
And hugs him.
*Lincoln hugs her back, liking the feel of her soft skin on her sides and back. Inside her mind, Serena, though liking this hug, can't help but feel worried about what his family and friends would say, expecting them to oppose Lincoln's decision.*
But will find out soon.
Serena: Can I ask you something, Lincoln?
Lincoln: Like what?
Serena: Are you sure you want this? I mean, you have family and friends on the surface. They might not be in favor of your decision. I'm worried about it.
Lincoln: I don't care what they say, as I'll still be with you.
Serena: ...
But slowly accepted him.
*They hold hands as they continue to explore the depths.*
And it was very fun.
*They spend 12 hours exploring the depths, looking at bizarre sea creatures around kingdom.*
*The two of them eventually return to Kraekkaria.*
AS they were excited.
*Niora and Bulla are chatting while Kema is on the surface with the Louds.*
They were concerned with what Lincoln is like underwater.
*Serena takes Lincoln to her room to show her what she has inside.*
Her room is big, has a large window, along with large curtains, seashells, a nice bed and crabs roaming around in there.
*Lincoln gets a bit worried about the crabs, fearing that they might pinch him.*
But soon sees that they have glowing shells on them.
*He gets amazed by them, and at the same time, confused at how they have those.*
But took his mind of this.
Serena: Like what you see?
Lincoln: Yes.
*She tells him about how the crabs' shels can glow.*
Lincoln: That's nice.
Serena: *narrows her eyes in annoyance for his sarcastic lack of appreciation*
Lincoln: Because of their colors.
Serena: *raises an eyebrow with her arms crossed over her seashell bra, with much of it still being visible*
Lincoln: I am impress.
Serena: Oh. Sorry about all that. *she looks away and blushes in embarrassment*