page 5: "I've keep running" should be "I've kept running".
page 6: "most happiest" should probably just be "happiest". Most is redundant in this context.
Page 10: "I made up my mind" is grammatically correct, but just based on the flow, it should be "I've made up my mind".
Page 18: "We're not the only ones who at fault" should be "We're not the only ones who are at fault". Or, it could be "who're" instead.
Page 22: "Misaki have finally accept" should be "Misaki has finally accepted". Likewise, "the story end" should be "the story ends".
Thank god you pointed out that this wasn't the end, because good lord that last (actual) page was such a blatant ending spread. Time for the gang to learn how to use Cheat Engine, Arbitrary Code Execution, exploits, and other gamebreaking bugs!