The plant featured in the ED is a "Hiiragi no Kokedama" (Holly Kokedama). The "Hiiragi" (柊) in its name refers to "Hime Hiiragi" (dwarf holly), which echoes the "Hiiragi" in the character Shuji's (柊二) name.

Therefore, the ED is styled like a music video about two best friends, who are also roommates, in love with the same boy.