Himegasaki Sakurako Is a Hot Mess Vol. 4 by Kosuke Yasuda

Long ago, when Natsuki was a child, he got matching pendants with.well, it sure wasn't our loser heroine Sakurako. But who was it? And can our loser heroine still win the day against one of the most powerful romantic tropes of all? It all comes down to the summer festival, where Natsuki will make his choice once and for all! (Unless yet another new girl arrives, but what are the odds of that?!)
Binding: Paperback / softback