★ Serialized on Tomato Novel with 270,000+ readers and 40,000+ reviews, honored as a "TOP-tier youth-healing work of 2025" in the site-wide ranking; now published in print in simplified Chinese.
★ He has secretly loved his best friend for nearly ten years — and the friend is completely straight. Until someone confesses to his face, and the friend steps in front of him: "He doesn't like men." He grabs the man's hand, enunciating every word: "Well, I do like men." — And the sky falls, on the friend this time.
★ Childhood friends, reunion after years apart, mutual pining: sharp-tongued but soft-hearted × the hospital's top orthopedic surgeon, cold-faced and warm-hearted. A kite with a broken string finally rides the wind to where it has always wanted to go.
★ The title comes from the collision of galaxies NGC 4038 and NGC 4039 — an encounter nine hundred million years in the making, a romance on a cosmic scale.
★ A little angst along the way, all sweetness in the end — an HE story of mutual first love and healing. If you love childhood-friend pining and two-way devotion, this is where a reunion of cosmic proportions awaits you.

Shen Shangnian and Chen Zhijuan grew up together. When Chen Zhijuan went abroad to study, it was three years before they met again. Seeing him in a crisp white coat, Shen Shangnian froze for a moment, no longer sure whether the person before him was still the boy he knew.
Chen Zhijuan is the top orthopedic surgeon at Beicheng Hospital — handsome, cold and quiet on the surface, yet tender underneath. His best friend Shen Shangnian is sunny and warm, always ready to help. After his mother passed away, his father remarried, and Shen Shangnian began spending his days at the Chen household, where the warm-hearted Chen parents treated him as their own. Chen Zhijuan excelled at school and often helped him study; Shen Shangnian, sincere if unremarkable in grades, had many friends — and he introduced them all to Chen Zhijuan. From school days into working life, they grew up together, and each found who he was meant to be.

Taoqi Wulong Zhengchangtang (桃气乌龙正常糖)
A highly popular author on Tomato Novel, who describes herself as "founder of the fantasy school and reigning champion of staying up late." Drawn to the words left unsaid and the bittersweet flutter of love, she hopes to write stories for a lifetime; she loves recording life's small everyday joys, hoping the words that carry a soul will burn forever.
Representative works: The Planetary Effect (《行星效应》, online title Who Taught You to Be a "Brother" Like This?); Meeting the Light (《逢光》, online title Blessing of the Gods, rated 9.5 on Tomato Novel, in print); Falling Spring (《陷落春天》, online title Wild Desires! My School Rival Has a Secret Crush on Me).

Chapter 1 Hello, Dr. Chen
Chapter 2 Does It Still Hurt
Chapter 3 On a Whim
Chapter 4 Worried Hearts Err
Chapter 5 In a Bad Mood
Chapter 6 Just a Quarrel
Chapter 7 We Made Up
Chapter 8 Welcome Home
Chapter 9 Live a Long Life
Chapter 10 The Tilting Umbrella
Chapter 11 Years Made Tangible
Chapter 12 Your Choice
Extra 1 Waking Up Nineteen
Extra 2 Waking Up Nine Years Later
Extra 3 High School Stories
Extra 4 A Christmas Gift (print edition exclusive)