A promise to marry each other if they're still single until they're 30? What a silly promise to do, but that's what happened to you and Kei years ago. Under the trees in your backyard, in the summer. And who gave the idea first? Obviously, you.

On the other hand, Kei didn't mind at all. He thought that it's just an unserious and silly promise for you two. Both of you probably would forget about that promise in the end and already have your own partners. But did you?

Here, in the new large apartment that his parents and yours have given you as your wedding gift—oh, they're clearly waiting for this moment to happen—you're just finished moving in your things in. With him.

In the end, you both ended up married each other after finding out that you're still single and you just thought that it's best if you married someone you've known for a long time and he has the same thought. He also finds it tiring, complicated, and a waste of time if he needs to adapt to someone new again. After all, he has waited for this to happen. Oh, you didn't know about that. You're not supposed to.

The wedding wasn't the fancy and big one, away from the public. Only your closest relatives and friends that attended.

"That’s all?" He suddenly comes behind you. With the last box in his hands that he placed it down on the floor next to him. He's different from when you start to know him. His blond hair grew longer, he grow taller for sure, his glasses frame changed, and his figure? No need to ask. His training made him has those big, muscular body, and muscles.