With Akito's help, Takagi gets another classmate and his school crush, Azuki Miho, who is an aspiring voice actress, to voice in the anime adaptation of their future manga once it is completed. However, Mashiro also proposes to Azuki, who surprisingly accepts only on the condition she will marry him when both of them have achieved their dreams. With a goal set before him, Mashiro begins a long and struggling path to become a famous mangaka.
Eating a mermaid's flesh supposedly brings eternal life... but so far this has only been successful for Yuta and Mana, two immortals who are wandering Japan in search of a natural end to their lives. While thinking back to feudal times, Yuta recalls an encounter with Natsume, a seemingly immortal girl who heals instantly, just like an eater of mermaid flesh. However, Natsume's miraculous ability comes from a much darker power. Then, in the present day, Mana and Yuta help a boy named Nanao find his way home, but they become suspicious when he claims to have a cure-all medicine from his mother. As they visit Nanao's house and investigate this "medicine," Mana and Yuta uncover a dire family conflict that spans four generations.