An age gap romantic comedy where the present and past intersect!

Mahiru, who was afraid of change and had not done anything until now.
However, after what happened with Asakawa, she changed her mind and started to actively approach him, thinking, 'I just have to keep going until Yuu starts liking me.'
In the midst of all this, Yu's birthday arrived.
Asaka invites Yu to a hot spring inn in Hakone and plans a hot spring trip for just the two of them.
To counter this, Mahiru decides to set up a club activity camp in Hakone and tries to sabotage Asaka.
As Mahiru becomes more proactive, Asaka, who goes to a school outside the prefecture and rarely sees Yu, feels anxious?? and uses a desperate measure to suppress Mahiru?!
You can't take your eyes off the burgeoning heroine race! Act 6 of the age-gap romantic comedy!