Ness is upset because he doesn't know what his relationship with Kaiser is, but he only comforts Kaiser when he's sad while when he's happy he's abandoned...like what does Kaiser want? Ness is still wondering about that

One day the two of them went to a quiet place and there were almost there was no one there, they went there just for the purpose of chatting, until Ness asks him first

"Kaiser...actually what do-"

Before Ness could finish his sentence, Kaiser immediately jumped into the river because the item he was carrying fell, which was an Isagi plushie doll

"MY YOICHIIII!!!"