He had just gotten the ability to make the castle go boom. But he didn't want to. Like Harry this place was his home. People didn't know that his mom hates him and his dad abuses him. That's why his magic is a little off.
She doesn't know if her father is alive. That's all she has left. She goes to the astronomy tower after the war is over, and takes off her radish earrings. She goes to throw them off the top.
He walks up the stairs to the astonomy tower because heights comfort him. He see's Luna and he slows down. Only she would be wearing purple on a day like this, he thinks as he chuckles to himself. He see's her un-hook her radish earrings and move her arm back.
He jumps in front of her and grabs her hand.
"Seamus let go!" She shouts. She wants to do this. She always believed that it would keep her safe, but all it did is lose her family.
"No Luna don't do this, you'll regret it!" Seamus says back softly.
"Just leave me alone" She says because he's wearing her wall down. She wrenches her arm from his grasp and throws them away from the tower.
As she crumbles on the floor she doesn't notice Seamus casting a nonverbal spell.
"Oh Luna. It'll be ok" He says as he goes down on the floor with her and holds her tightly.
He lifts her chin up and slowly, and softly, kissed her.
She looks at him, and kisses him back.
He moves back and in his hand are the radish earrings.