「大切な場所くらい一人で守れなきゃ、マリンも俺を認めない」
剣呑なスパイ活動で荒んだ射士郎の心を癒す場所、水族館。
射士郎はその日も水族館で1人心を鎮めていた。
しかし、束の間の安寧のはずが
そこにはアルバイトをする未来の姿が。
気分転換に水を差され顔をしかめる射士郎だったが突如苦魔獣が出現。
大切な場所を汚されまいと気焔を吐く射士郎に
協力を買って出る未来だったが、
自身のプライドを捨てられない射士郎はそれを拒否。
冷え切った2人の関係に雪解けは訪れるのか──。
"If I can't protect a place that's important to me on my own, Marin won't accept me." The aquarium is a place where Ishirou can find solace in the troubled heart of his dangerous espionage activities. That day, Ishirou is once again at the aquarium, calming his mind alone. However, his moment of peace is only just beginning when he finds Mirai working a part-time job. His mood is ruined when a bitter beast suddenly appears. Mirai offers to help Ishirou, who is determined not to let his precious place be sullied, but Ishirou, unable to let go of his pride, refuses. Will the cold relationship between the two ever thaw?
Mira tombe sur Ishiro venu se ressourcer et réfléchir à l'aquarium, lieu lié à son passé d'espion.
Ils sont alors attaqués par les Hashiriyan. Mira offre son aide, mais Ishiro, fier, la refuse. Leur relation est mise à l'épreuve.
