Angel Beats! Spin-off: Tabi Suru Tenshi-chan

Kanade Tachibana is a beautiful girl known as "Angel-chan" at school. She is traveling all over the country in search of "someone." One day, while staying in Kanagawa, she met Yuri Nakamura, a happy and cheerful girl. Along the way, other people who look like SSS members (?) also appear⁉ Will Angel-chan be able to find that special "someone"…? (Source: ComicWalker, translated)