“Yuki is… my younger brother.”
Masachika confesses the truth in the park at midnight.
Arisa, who couldn't stand to see him deny himself by saying that he lived by sacrificing his younger sister,
Grabbing Masachika's hand, he goes to find Yuki, who has the flu!
Masachika, encouraged by Arisa, finally confronts his mother and grandfather.
Masachika hesitates but tries to move forward.
Meanwhile, Arisa, who has learned of Masachika's circumstances, is also caught up in hesitation...
The moment when the two finally made a decision─
Arisa talks to Suou Yuki for the first time.
"ah.
Welcome, Miss Arya.
“You came.”
Affection, determination and love.
Where will the entangled emotions of these three people lead?!

A hugely popular youth romantic comedy!!
Volume 9 dedicated to all the younger sister fans!!