Gunjou Gakusha - Vol. 4 Ch. 34 - Spy and Spy

[MangaDex]

 

[RedScharlach]

This is something only regular long distance commuters can truly understand.

 

[Junpaku]

Hah, knew the stewardess was a third agent from the very beginning. Not just as a likely trope but artist did a good job on her design and with all my experience reading manga I could just tell she was a confident experienced person playing a somewhat airheaded persona.