I'm glad this was uploaded with all chapters 7-12 at once. Otherwise the suspense would have killed me.
Glad that the professor didn't hold any grudges. Mari really deserved prison, what she did was not cool.
But what did Akari go to prison for? If Mari had to kill someone to end up in prison town, I don't think Akari just did something as inconsequential as public littering.
Anyway, once a year? Awwwww... I wanted to see them be lovely dovely all the time...