The Girl I Saved on the Train Turned Out to Be My Childhood Friend

Although Class 2-B’s school festival plans have all been neatly wrapped up, the sudden arrival of a transfer student leaves Ryou and the gang no time to relax! Their strong-willed new classmate is none other than Ryou and Hina’s mutual childhood friend, Ai Himejima, who apparently used to have a crush on Ryou…and still might not be over him! This unexpected competition gets Hina more fired up than ever to win over her sweetheart on the impending school trip. When an overnight stay at a hot spring cranks up the heat, will Ryou melt to Hina’s advances, or…?!

The school trip has just started, and Hina’s already snuck into Ryou’s room! She’s coming on strong, but how will he respond? Plus, Hina’s not the only one trying to make a move—the next day is Torigoe and Ryou’s souvenir shopping date! Though, when Hina accidentally sees them getting along, she takes a hit to her resolve that might be tough to recover from...

Though the gang has decided on the lead actress for the class’s indie film, there’s still a script to be written! And what better way to brainstorm than a session at Ryou’s house?! But when Ai finds Ryou’s old notebook from when they were kids, the two uncover forgotten promises that put a whole new spin on his current relationship with Hina. Unable to recall much from back then, Ryou begins wondering why— and what exactly Hina had to do with it…

With the script completed, Ryou and the others prepare to shoot their indie film over summer break. He intends to give it his all as the director, but there’s just one problem—they don’t have money for filmmaking equipment! Luckily, former idol Ai knows someone who might lend a hand, which gives her the chance to go on a date with Ryou! Can she finally get her feelings across even though Ryou’s so dense?

Did Hina really lie about their promises? Why is Ryou so dense about love? And why can’t he recall parts of his childhood with Hina? As the crew wraps up their film, Ai and Torigoe are determined to make one last stand before throwing in the towel. And when the mysteries of the past are unraveled at last, Ryou resolves to face his feelings once and for all…! The sweet and fleeting love story of childhood friends concludes in this final volume!