飛沫(しぶき) refers to tiny droplets or spray that burst into the air, often from water or a powerful impact. It is a vivid, poetic word that is less common than everyday terms for “water droplets.”
In the song, hope and despair are imagined as exploding into 飛沫 and raining down on the person. This striking image suggests overwhelming emotions, while the singer gently tries to protect them from the impact.
"The Hole" opens quietly: someone alone on a park bench under a clear sky, thinking about another person. Then the song turns into an offer. The singer keeps telling someone they are allowed to fall apart: "吐き出せばいいよ 取り乱せばいいよ" (it's okay to let it all out, it's okay to lose it), and later "逃げ出せばいいよ" (it's okay to run away). The hole of the title is "ぽっかりと空いたその穴" (that hole gaping wide open), an empty space inside a person, and the request is simple and kind: "僕に隠さないで見せておくれよ" (don't hide it from me, show it to me).
The line that sticks is the chorus ending, "僕が傷口になるよ" (I'll become the wound). It is a strange image and that is the point: instead of promising to heal you, he offers to take the injury on himself. The song is blunt about why this matters. It names being hurt by "誰かの物差し" (someone else's measuring stick), comparing your future to other people's, and it says outright that a loved one can become "自殺志願者" (someone wanting to die), because "僕らはそのくらい脆く不確かで" (we are that fragile and uncertain).
Words worth learning: "守らなくちゃ" is casual speech for "I have to protect", a short form of 守らなくてはいけない. "ぽっかり" describes something gaping open, like a hole that suddenly appears. "おくれよ" in "見せておくれよ" is a soft, old-fashioned way of asking someone to do something for you.