Anyway, I'm Falling in Love with You. Volume 7

Despite harrowing memories of the pandemic, Mizuho still recalls her springtime of youth with fondness. Ten years later, she and her childhood friends are preparing for a reunion, but Kizuki is MIA. His absence leaves a big hole in Mizuho's heart, especially after the romance that bloomed between them in high school. What caused Kizuki to betray their special bond?