: The chains often seen in the series are revealed to be literal trauma flashbacks; Yuuhi was once physically chained and locked in a closet by his grandfather.
: This chapter/episode is widely praised for its handling of Yuuhi's trauma. After his grandfather passes away, Yuuhi refuses to follow the trope of "forgiving an abuser" just because they are dying. Instead, he acknowledges his grandfather's terrible behavior while still saying a proper, complicated farewell. Hoshi no Samidare 18
“The absolute justice boner I had when Yuuhi threw his chains into the air and yelled, "serves you right!" after his grandpa died. No one should be pressured to forgive abusers.” Reddit · r/anime : The chains often seen in the series