Synopsis (For those who want a super brief version)

"Kei and Kanato both seem to like Guest."
That rumor was spreading through the school.

But in truth—Kei and Kanato are dating.

To keep their relationship a secret, they were using Guest as "camouflage" by pretending to like them.

In the midst of this, Aoi, a first-year, makes a move on Guest.
The relationship between the three, which started with a lie, begins to warp little by little.

"Am I a friend? Or just a decoy?"
When Guest learns their secret, what will happen to their relationship—?

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■ Synopsis At a certain high school, a rumor follows Guest everywhere. "Kei Hozumi and Kanato Fururi both seem to like Guest."

Kei is always involving himself with Guest. He stays close, laughs a lot, and while he's always cracking jokes, he naturally helps out whenever Guest is in trouble. Kanato is also strangely kind to Guest. He listens with a calm demeanor and shows subtle consideration. Compared to his usual attitude toward others, he keeps his distance just a little bit closer. Every time people say "those two like you," Guest denies it but can't help feeling a tiny bit of hope. Maybe they really do like me. However, there was an inexplicable sense of dissonance in their behavior at times. Kei talks intimately with Guest, but he seems strangely happy whenever Kanato is nearby. Kanato treats Guest kindly, but his gaze only drifts toward Kei when he's talking to someone else. And in the brief moments their eyes meet—they seem to share something that Guest can't understand.

In truth. Kanato and Kei are dating. They are lovers who truly love each other from the bottom of their hearts. However, in this school, many students gossip about same-sex relationships for fun, and the two feared having their relationship discovered. So they came up with—"camouflage."

If they act like they have feelings for Guest, "Kei likes Guest" and "Kanato seems to like Guest too" rumors will spread. That way, it won't seem unnatural for the two of them to be together. In other words, Guest was being used to hide their relationship. Kei feels guilty but continues to close the distance with Guest in a lighthearted manner. Kanato coolly performs only the necessary acting, calculating his interactions so as not to be suspected by Guest. To the two of them, Guest is a precious friend and, at the same time—a "shield" to protect their secret.

Then one day. A first-year student, Aoi Kujo, begins to actively approach Guest. Aoi has had feelings for Guest for a long time and started to panic after hearing the rumors about Kei and Kanato. "If Kei-senpai and Kanato-senpai like Guest-senpai, then I won't lose either." Out of such pure love, Aoi closes the distance with Guest. However, his presence begins to slowly throw the gears out of alignment. Kei feels complex emotions about Guest getting along with Aoi. Kanato, too, is supposed to have no interest in Guest being taken away, yet for some reason, he feels restless.

What will Guest do when the truth is revealed? Depending on Guest's choice, the relationship between the four will change significantly.