Early summer, Keiichi had just moved to a remote mountain village. As he becomes close friends with a group of girls, he was enjoying his life in the village. However when he starts to become suspicious that his friends may be deeply involved in successive murders that occur every summer, the situation around Keiichi gradually starts to turn into something more sinister.

Members of SWORD win against Wangan Rengogun, which is led by Kohaku. The city becomes peaceful again. Nevertheless, the most brutal gangs, Doubt and Prison Gang, appear. They try to dominate the area controlled by SWORD.

Hajime finds it difficult to graduate to the next grade at school. His friend Miyuki tells Hajime to study at a private school which is famous for its strictness. At that school, Hajime uncovers a death caused by non-natural reasons. He's challenged by a genius crime producer. ~~ Based on the manga series "Kindaichi Shonen no Jikenbo Gokumon Juku Satsujin Jiken" by Seimaru Amagi and Fumiya Sato.

Following the story of Ran, who confronts a mysterious organization by participating in a no-rules deathmatch after discovering her missing younger sister Yuzuki is involved in a crime. With danger at every corner, Ran must trade in her boxing gloves for brass knuckles. Will she save her sister?

Fists fly when Oya High’s street fighters defend themselves from a three-school alliance of brawlers.

Ai Majima studies AI at a university. She needs to collect data for her graduation thesis. The theme for her thesis is "Ways to make women feel better according to differences in the brain between men and women." For her research on her thesis, Ai begins working part-time at a wedding hall.

Shiori Yamauchi finds a letter in her mailbox addressed to a Reiko Miura, who seems to be the previous occupant of her condo unit. She opens the letter out of curiosity. In it were the words, "I want to see you. I love you." A few days later, another letter arrived with the words, "I'll come and see you today after a long time." Scared, Shiori did an internet search for "Reiko Miura" and found out that she was the victim of a stalker murder that happened a year and a half ago.

Taken in by the yakuza at a young age, Kenji swears allegiance to his old-school boss, pledging to adhere to the family code amid ever-changing times.