【Summer × Romance Simulation】Winner of the Moe Game Award! A masterpiece depicting a love triangle unfolding over summer vacation—Aonatsu Line!

“What are you doing for summer vacation?”—a casual everyday question like that marks the beginning. But what if that one sentence became the doorway to a precious time you'd find yourself recalling later in life......? “Aonatsu Line” is a story that gently scoops up such fragments of youth and delivers them straight to the player's heart. Centered around an ordinary but somewhat endearing high school boy, Tatsumi Oikawa, and his cheerful childhood friend, Miki Kousaka, along with his slightly sarcastic yet dependable best friend, Chihiro Sakaki, the three spend a laid-back yet passionate time planning their summer vacation. With the addition of Yui Nakategawa, a refined transfer student, and Kotone Shiino, a younger student who failed her school debut, the story quickly picks up speed.

At first glance, it may seem like a typical romantic comedy full of summer antics with cute heroines— But the brilliance of this work lies in how it thoroughly portrays “what comes after.” It delicately depicts not only the excitement of falling in love, but also the painful emotional turmoil that grows as those feelings deepen. Rather than ending with a simple confession, the story unfolds in a way that leaves players' hearts torn as they watch where each character's feelings will lead. The emotional highs and lows flow beautifully like a movie, with many tear-jerking scenes throughout.

“I used to worry about such silly things,” you might laugh when you're older. But back then, that “silliness” meant everything to who you were. “Aonatsu Line” portrays emotions so real, you can't help but overlay your own youth onto it. Each heroine’s inner world is carefully depicted, and once you empathize with a particular character, your heart will surely be swept away. As they struggle, clash, and gradually mature, you'll find your own youth mirrored in their journey before you even realize it.

A once-in-a-lifetime bittersweet summer story. Why not return to that season once more with “Aonatsu Line”?