To Your Eternity (不滅のあなたへ, fumetsu no anata e), also known as To You, The Immortal, is a manga series by Ooima Yoshitoki. It began serialization in Shounen Magazine (Weekly) on November 9, 2016. It is digitally published in English by Kodansha Comics USA.
"An immortal being was sent to the surface of the earth and met a boy living alone in the middle of the tundra.
The being can take the shape of dying things, but only if the "impetus" is stronger than the previous one. What sort of experiences and meetings will the being encounter while living forever."
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Chapter 17: "Left to His Own Ends"
Beer Gramps tells everyone why Gugu stormed out of the house and they are all shocked to learn why. They question him, asking why he would even think of storing alcohol inside of Gugu's viscera. He responds, explaining that finding Gugu after the accident was an opportunity to test out a long-held dream of finding out what happens to alcohol inside the human body. Rynn tells him how horrible he is for doing such a thing and that he should go after Gugu and remove the alcohol immediately. The old man refuses because he needs to work and asks Rynn to go after him instead, however, she also refuses because she doesn't know Gugu at all and has no reason to go. She asks Fushi to look for him and says that he must be worried about Gugu, but Fushi says "No. Not worried."
They start discussing who is going to make dinner now that Gugu is gone. Pyoran offers, but Fushi says he will make it.