Embark on a heartwarming journey with 'Summer Vacation Free Research: Engagement Annulled Observation Diary,' a captivating web novel in Japanese. Follow the emotional tale of a person sharing the story of their brother and his childhood friend, whose engagement was abruptly annulled by her fiancée. Dive into a world of drama and romance, filled with elements of broken engagement, childhood friends, and an enchanting European ambiance. This oneshot novel delves into the lives of siblings and unveils the complexities of villainess noble girls, promising a poignant and unforgettable reading experience.