Hasegawa Kodaka ya sauya makarantu, kuma yana shan wahala wajen yin abokai. Hakan baya taimaka wa cewa gashi mai launin gashi yana sa mutane suyi zaton shi mai laifi ne. Wata rana, sai ya yi karo da abokin karatunta mai suna Yozora yayin da take magana da rai da ƙawarta Tomo. Ganin cewa babu ɗayansu da yake da abokai na gaske, sai suka yanke shawara cewa hanya mafi kyau don canza wannan yanayin shine ƙirƙirar ƙungiyar da fara ɗaukar ma'aikata.
Wannan shine yadda aka kirkiri “Rinjinbu”, kulob wanda aka kera shi musamman don mutanen da basu da abokai da yawa. Kamar yadda sauran abokan karatuna ke bi a hankali suna shiga karamar kungiyar su, zasuyi kokarin koyon yadda ake kulla abota ta hanyar girki tare, wasa wasanni, da sauran ayyukan kungiyar. Amma shin wannan rukuni na rashin dacewar dangantaka zai iya samun daidaito?
