Mei Hachimoku is a Japanese author best known for The Tunnel to Summer, the Exit of Goodbyes and Wait For Me Yesterday in Spring.
Koudon is a Japanese artist best known for series including
Jinrou Game and
The Tunnel to Summer, the Exit of Goodbyes: Ultramarine (Manga). KUKKA is a Japanese artist whose artwork has been used in multiple light novels, including
The Tunnel to Summer, the Exit of Goodbyes.