In the late 2000’s or so, Looseboy was quite a popular eroge writer for Sharin no Kuni, Himawari no Shoujo and G-senjou no Maou. His main genre was “human drama,” which showed through quite strongly in both of his works (more in the former than the latter). He was also supposed to be one of the writers in Taiyou no Ko (probably dead), a collaboration eroge that was announced at around the same time as Key’s Rewrite, which was also a collaboration with famous names except it actually came out in a timely manner. Anyway, if you’ve been following eroge for a decent amount of time you’ve probably heard of the guy and maybe, at one point, was hyped for his stuff.
He kinda went without attaching his name to anything major for a long time, but came out with Boku no Hitori Sensou last month. Unlike his previous works, this is a medium-priced, single-heroine eroge. It’s also probably better off that way.