<report>Surprisingly underrated. This is an action-packed story following a widower out to avenge his wife, while trying to uncover the truth behind the spotting of a mermaid and the disappearance of the team searching for it. Feels more like an actual novel with visuals than a visual novel which was enjoyable.
Has great art, which the screenshots on the vndb listing don't show well. Unfortunately almost all of it is spoilers, or I'd add them. Impressive amounts of CGs, several scenes were changing between detailed CGs every other line, especially in combat. The soundtrack is decent, though lacking in quantity (chapter one mostly used one song).
Highly recommend if you're looking for a shorter, more serious work with the addition of some horror and emotionally impactful moments.