Because I'm a Father (父親だから, Chichi Oya Dakara) is chapter 664 of the Naruto manga.
As the mysterious person makes their way closer to Sasuke, neither Tobirama nor Karin can recognise them, nor their chakra signature. Worrying that the mysterious person intends to do harm to Sasuke, Karin presses on ahead. Meanwhile, Guy is ready to continue fighting, though he is obviously extremely worn out. Suddenly, Gaara and Sakura fly overhead. Guy deduces that they will head for Kakashi's location, and gets even more determined to go, exasperating Tenten. While Madaraflies towards his destination, he gets rid of both the Kohaku no Jōhei and Benihisago noting that the tools were bogging him down. The tools land on Guy and Lee and Tenten then recognises the tools. On the other side of the battlefield, Kakashi and Minato still fight Black Zetsu until Minato's half of Kurama urges him to sense around. As the Kazekage's group arrives, Minato asks Kakashi to fight Obito alongside Gaara as the Hokage starts transferring his tailed beast in his son, all the while remembering a conversation with his wife over protecting their then-unborn child. Before he completes the ritual, however, Black Zetsu manages to extend his body and absorbs Kurama's power in Naruto's place. As he laughs over finally getting his hands on Yin-Kurama, Madara arrives to where Minato and the others are and states that Black Zetsu was taking too long so he decided to come himself.
Tobirama is mistakenly depicted without the black rods in his back or head. However, this was not corrected in the tankōbon version.