Join Muichiro and Nezuko in a heartwarming modern AU fanfiction that follows the journey of Nezuko's quest to bring back the spark in her boyfriend's eyes. As Muichiro's 15th birthday approaches on August 8th, Nezuko hatches a plan to make the day unforgettable. From surprise meals and thrilling amusement park rides to a romantic beach picnic, she meticulously crafts an adventure to ignite Muichiro's emotions. With each carefully planned event, Nezuko witnesses the transformation in Muichiro as he rediscovers the joy of the moment. But the surprises don't stop there. As the sun sets over the beach, Nezuko reveals the ultimate surprise - Muichiro's long-lost twin brother, Yuichiro. Tears flow, emotions run high, and the bonds of brotherhood reignite. Join them on this journey of love, friendship, and rediscovery as they celebrate a birthday that will forever hold a special place in their hearts. "Summer Sparks" is a tale of emotion, connection, and the magic that comes from those who care deeply.

During a walk outside in the woods at midnight, Muichiro and Nezuko encounter 2 demons. After defeating them, both are covered in blood, excluding Nezuko, who has healed. They decide to head back. But before they can even get two steps away, Muichiro suffers a sudden transformation into a demon. (it wasn't the demons' blood, it was Nezuko's). Nezuko is desperate to keep Muichiro away from the Hashiras and other Demon Hunters. But it's not long before the Hashiras find out...

All One shots!