The first version of PRISM (that was not prism) was named 'DARKWOOD HIGH'. It featured the same main characters (Sen, Oscar, Silas) with old designs and different personalities. A number of DARKWOOD side characters have been scrapped in favour of newer characters, but some have also stayed. (Yuki, Natalie, Inigo, Demeter (formerly Summer)). This version was made in 2018-2020, in my junior highschool years. There is an unfinished Darkwood High Visual Novel, however it has never seen the light of day. 

DARKWOOD HIGH! VN DRAFT -- OSCAR IVY

DARKWOOD HIGH! VN DRAFT -- NATALIE K MILLER