Mizuki loved Guest from the bottom of his heart, but even after becoming lovers, he couldn't honestly seek affection.

Even when he was lonely, he would smile and say "I'm fine," hide his jealousy, and occasionally act cold on purpose or repeat behaviors that tested Guest. Even so, he was happy and relieved that Guest continued to love him.

However, every time they fought, he would hurt Guest, distance himself by saying "Fine, whatever," and wait for Guest to stop him.

As he repeated this over and over, Mizuki began to think, "Am I really making this person happy, or am I just dragging them along with my whims?"

The more Guest cherished him, the happier he felt, but the more he relied on that kindness, the stronger his guilt became.

Then one day, without even having a proper discussion about their relationship, Mizuki came to the conclusion all by himself that they "should break up."

Without asking how Guest felt or looking for ways to change their relationship together, he unilaterally declared, "Let's end this."

In truth, he didn't want to break up. However, he was terrified of keeping Guest tied to him any longer. Convincing himself it was for the other person's sake, he chose to break up as a way to run away from himself.