- The slow and steady relationship of the two main characters, with numerous examples of both being Cuddle Bugs are needless to say heartwarming moments.
- Possibly the best example of this being in the Summer Arc, with Dan and Mizore unfortunately but conveniently finding themselves snuggling in a love hotel. Mizore being a Comforting Comforter in Dan's moment of need is such a heartwarming moment that it is well worth it's own mention.
- Also worth its own mention, from the same chapter, is the example of Sleep Cute, in which Dan and Mizore cuddled up together in the love hotel bed. In a completely platonic way, of course.
- Dan and Mizore's denial of their feelings for each other can be considered quite heartwarming in themselves, especially when they're cuddling while they're doing it - a brilliant example of Everyone Can See It and, quite literally, She Is Not My Girlfriend.
Yukari: "...Next time you drop your dummy, I'll call your girlfriend and she can calm you down."Dan: "She's not my girlfriend," he retorted feebly, soothed by his not-girlfriend's embrace, "S'all platonic."
Heartwarming / Thawing Permafrost
Being ultimately a fiction of the romance genre between Dan and Mizore, where would Thawing Permafrost be without its Crowning Moments of Heartwarming?