Kobi no Kyoujin: X Side

"Tomorrow, I will curse my father..." After meeting with his father who has been apart from him ever since he was an infant, Ryou suddenly time traveled to 22 years ago! He was sent to the late Shouwa period. After that, there's also his father, Konomi, who is just three years below him...! With the unfamiliar environment and the anxiety from the inability to go back to the past just heightens Ryou's worries. While trying to recover his transparent-like existence, his feelings began to change... (Source: Libre, translated) *Chapter count includes four extras.*

Kabu was told by his father, that he is going to succeed the Umezaki group, but he is hesitant to do so. On the other hand, Sagawa, who is regarded as the successor of the group by everyone else, tests Kabu’s loyalty by giving him an ultimatum, to give up his company or Nirasawa. For Kabu, Nirasawa is not only a convenient pawn, but at the same time he’s a lover, that has captivated him with his unexpected cuteness. Will Kabu really send Nirasawa away…!? *This story takes place 4 years after the events of Bi no Isu.*

A short story from Pink Gold 2 about pervy little boy and not so smart teacher.