I can't tell the difference yet.
I'm not even half way. I aim to get "all complete". When it's done, everyone will congratulate Junichi in his room. It's a long way to go.
The visual novel is different from the PS2/PSP story. It's more like fan work from the official source.
Tech Gian story events are comparatively few. In EX5, Junichi is like a different person.
Spoiler:
He has a pure heart, and he believes in Santa. He is traumatized after receiving the mockery from his peers. However, he's not giving up. He waits for Christmas, so he can take the picture of Santa. He encountered Santa, but it is not once. He meets six Santa. His younger sister is also involved. No, it is not his school's annual Miss Santa contest.
In EX5, Miya cosplays the deer.
In EX6, Risa stalks Junichi in some previous route. For example, she sees that Junichi makes the love confession to Maya. Out of Risa's discontent, Maya found out her lunch is spoiled.
Miya cosplays squidman(the same squidman from the theme park).
