Things are settling down with the two battery girls, but Hosomichi's regret is catching up to him. He believes what they fight for may not be worth the damage they cause. Meanwhile, a strange box appears in their room...
"Year 90 of Eternal Showa" 
‫"العام الـ90 من فترة (شووا) الأبدية"
Ewiges Shouwa-Jahr 90
AÑO 90 DE LA ERA SHOWA ETERNA
AN 90 DE L’ÈRE SHÔWA ÉTERNELLE