One plot idea could be that Harry discovers a hidden diary or memory of Lily Evans that has something to do with a lemon - scented charm she was working on. This could lead him on a journey to understand more about his mother's magic and her relationship with certain elements in the wizarding world. Maybe the lemon - scented charm has some special power that can help Harry in his fight against the dark forces.
Perhaps in the fanfiction, Lily Evans left behind a lemon - tree in the Hogwarts grounds that has some magical properties. Harry, while exploring the grounds, stumbles upon it and starts to have visions or experiences related to his mother. The tree could be a gateway to a hidden part of Hogwarts or a source of magic that only those related to Lily can access. This would create a connection between Harry and his mother's legacy in a very unique way.
Maybe in the fanfiction, there could be a spell gone wrong that causes Lily to forget her relationship with James and fall in love with Harry instead. Harry, at first, is shocked but then realizes that he has a chance to be with his mother in a different way. The story could then follow their journey of dealing with the confusion and the consequences of this new relationship, including how it affects the prophecy and the fight against Voldemort.
One plot idea could be that James and Lily are brought back to life briefly and they meet Harry at a crucial moment in his fight against Voldemort. They offer him words of wisdom and strength that he didn't have before, which gives him an edge in the final battle.
A possible plot could involve an alternate universe. In this universe, Lily doesn't end up with James Potter. Harry, being from his own universe, arrives in this one and meets Lily. They initially bond over their shared magical abilities and a sense of not quite belonging. As they spend more time together, they develop feelings for each other, which is a huge shock to Harry at first as she is his mother in his own universe.
One idea could be a time - travel plot where Harry somehow gets to meet Lily in a parallel universe. They could bond over their shared magical abilities and family traits.
One interesting plotline could be a story where Lily survives Voldemort's attack. In this scenario, she has to deal with the aftermath and also raise Harry in a very different wizarding world. Her relationship with Harry would be more of a traditional mother - son relationship, but with the added complexity of the wizarding world's politics and the threat of Voldemort still looming. This would allow for a lot of character development for both of them.
A great plot idea is that Sirius and Lily form an alliance to protect James Potter. Sirius, being James' best friend, and Lily, being James' future wife. They could have adventures together, facing off against Death Eaters even before the full - blown war starts. It could also be a story where Lily's kindness starts to rub off on Sirius, and he begins to change some of his more reckless ways. For example, he might start to study more seriously under Lily's influence. This could lead to some really interesting character development for both of them.
One unique plot idea could be that Lily Evans is somehow able to communicate with Harry through a special magical object. For example, a mirror that was enchanted by Lily long ago. This could allow her to give him advice and guidance during his adventures at Hogwarts. Another idea is that Lily's ghost lingers in a way that only Harry can see, and she helps him uncover secrets about the wizarding world that were lost over time.
I'm not sure specifically which 'Harry and Lily Evans' lemon fanfics are good. However, you can start by looking on popular fanfic websites like Archive of Our Own. Just be sure to check the ratings and reviews to find ones that are well - written.
One popular 'Harry and Lily Evans' fanfiction could be 'A Mother's Love Reimagined'. It delves into an alternate universe where their relationship has unique and complex interactions. Another might be 'Lily and Harry: Bonds Beyond Time' which explores the special connection between them in a rather emotional and engaging way. There's also 'The Unseen Bond of Harry and Lily' that focuses on their unspoken understanding.
Another interesting plot could be that they are sent forward in time instead. They have to adapt to the future wizarding world which has changed a great deal. They might be shocked by new magic technologies and different social structures, and their reactions to these changes can make for an engaging story.