It's Hibiki who is crying. This artist's Inazuma does not feature inward pointing sidelocks like the crying character has, while he depicts Hibiki and Akatsuki with them.
There is also the positioning to consider, which Inazuma was the one sleeping in the middle.
E...even if you ask me...On the verge of tears!?She went back to work. She picks work over her sister!?Where's Akatsuki...?