Heartwarming / Gensou Shoujo Taisen

• Chapter 64 - The Battle in the Center of the Mind to save Koishi's heart from herself, and convince her that she is not alone.
• In Chapter 65, Mima reunites with the party after a long absence. She and Rinnosuke have a short but sweet conversation about how far Marisa has come, both as a person and a magic user.
• It's clear in Chapter 68, Shinki really doesn't want to seal Byakuren away again. So when it's revealed that they won't have to seal Byakuren away as they can reason with even the residents of Hokkai, there's clear joy everywhere. Shinki is so overjoyed, even, that she goes to visit Gensokyo in hopes of speaking more with Byakuren and Alice in the very next chapter.
• If you have Reimu check the pond behind her shrine every single time in all four games, the last time in Dream, Genji will appear as an elderly turtle. But it is "no longer his time" and she can no longer see him, but he still gives her his blessing; becoming an "item" that gives S-rank in all terrains and +2 Movement.
• Part of what drives the Prismriver Sisters to break their own limits and overcharge their music to negate Namazu the Catfish's energy drain effects in Chapter 74 is a subconscious Big Sister Instinct triggered by what seems to be a dream-soul left behind by their long-dead baby sister, Layla.