Unification of Japan Gaiden: Yamazaki Ichimon (2020)

Around the same time as Kikumura’s disappearance, the Ryūseikai relocates its office.
Strictly warned by the new landlord to keep things quiet, Himuro (Yasukaze Motomiya) cautions Tamura (Yoshiyuki Yamaguchi) and the rest of the members. However, Kawakami (Tatsuya Nakazawa) and Nakajima (Masami Tate) ignore the warning and immediately start causing trouble, earning Himuro’s fury. Meanwhile, a phone scam targets the home of the Kunimoto couple, whom Yamamura (Kenta Kawasaki) is close to. Hoping to catch the culprit, Hasegawa (Daisuke Oyama) and Ishizawa (Hiroto Honda) lie in wait at the house. They capture the money mule who shows up and take him back to the office—
unaware that this marks the beginning of a nightmare night.