"Alfonsina y El Mar" is a song that speaks about the death of the Argentine poet Alfonsina Storni. The lyrics describe her walking towards the sea and taking her own life, overwhelmed by her struggles and sorrows, including her diagnosis of breast cancer. The song portrays the sea as a place of peace and comfort where she will find solace for her pain. The last part of the song talks about her departure and how she becomes one with the sea, represented by the image of her being dressed in seafoam. Overall, the song reflects on the themes of solitude, pain, and transcendence through death.