(Video Game/DLC) : A popular slice-of-life RPG/visual novel and its " Summer Memories+ " expansion.

The "link" you remember wasn't just a hyperlink; it was a portal. Schools were out, so learning became voluntary. Enature net tricked you into biology, botany, and ornithology because it was fun. The "summer memories" attached to that link involve:

Consider the average summer day in 2002. You wake up, eat a bowl of cereal, and immediately hear the "You’ve got mail" voice. You log onto enature net not to socialize, but to investigate. You had found a strange egg sac in the bush yesterday. Was it a praying mantis or a invasive stink bug?