Above adjective – Appearing earlier in the same text. Upon is a synonym for above in on topic. In some cases you can use "Upon" instead the word "Above" as a preposition or an adverb or an adjective, when it comes to topics like over, on top of, higher in position. popular alternative
Upon preposition – In or into contact with. Above is a synonym for upon in position topic. You can use "Above" instead the word "Upon" as an adverb or an adjective, if it concerns topics such as on. popular alternative
The main storyline follows as above and upon completion unlocks both an afterstory and the Prologue of Grisaia, a short story detailing how all five girls came to Mihama and ending with the announcement that Yuuji will soon be attending.