Episode 15 recap: Yin Guo and Lin Yi Yang separated when Yin Guo returned to their home country.

At night, Lin Yi Yang drove with Yin Guo to the mountains and set up a telescope to gaze at the beautiful night sky together. Taking advantage of this romantic setting, Lin Yi Yang expressed gratitude to Yin Guo. It was because of Yin Guo's presence that Lin Yi Yang had the courage to return to the arena directly. Upon hearing the news of Lin Yi Yang's return, Yin Guo was also very excited and hugged Lin Yi Yang, crying. Yin Guo even asked Lin Yi Yang to wait for them, saying that if Lin Yi Yang didn't return to the country, they would come back to find Lin Yi Yang overseas. However, Lin Yi Yang found this situation difficult for Yin Guo, so they decided to take on the more challenging tasks and accommodate Yin Guo.

After enjoying the beautiful night sky, Lin Yi Yang and Yin Guo slept in the car. Yin Guo lay on Lin Yi Yang's legs, and some funny incidents occurred, making them feel like they were eloping. The next morning, as soon as it dawned, Lin Yi Yang took Yin Guo back. Yin Guo reluctantly packed their luggage because Yin Guo was returning to their home country that day.

After Yin Guo finished packing, as soon as they stepped out of the door, Lin Yi Yang was waiting in the living room. Both of them looked at each other with reluctance. Lin Yi Yang made the last cup of coffee for Yin Guo in their foreign country. As they had to part ways, they tried to find topics to keep talking to each other, fearing that they wouldn't be able to communicate once they were separated. Yin Guo even hoped that Lin Yi Yang would take them to the place where they first met to reminisce. Although Lin Yi Yang felt heartbroken, they continued to comfort Yin Guo.

When they were going downstairs, Yin Guo couldn't bear it and went to the laundry room to take many photos as souvenirs.

Even after taking photos, Yin Guo kept finding excuses to stay and continue taking pictures. Lin Yi Yang saw through Yin Guo's thoughts and told them that they could take the photos and send them to Yin Guo. Only then did they accompany Yin Guo to the airport.

Even at the airport, Yin Guo hesitated to board the plane. They wanted to stay with Lin Yi Yang, even if it was just for one more minute. At this moment, Lin Yi Yang also felt heartbroken, holding Yin Guo as they leaned on Lin Yi Yang's shoulder and shed tears.

Reluctantly, Yin Guo finally boarded the plane. Even at the moment of entering the boarding gate, Yin Guo turned back to look at Lin Yi Yang, hoping to have one last glimpse of them. After Yin Guo left Lin Yi Yang's sight, Lin Yi Yang sent a message, wishing Yin Guo a safe journey. They deleted the nickname they had for Yin Guo, as Yin Guo had changed their name specifically for Lin Yi Yang to see.

Yin Guo asked Lin Yi Yang to send them an impressive expression, but Lin Yi Yang didn't reply immediately. Yin Guo waited, and when they finally received the expression of reluctance from Lin Yi Yang, they sat alone in the airport hall and cried.

Meanwhile, Lin Yi Yang took the subway back to their place alone. Before shutting down their phone, Yin Guo sent a message to Lin Yi Yang. It reminded Lin Yi Yang of the scene when they first rode the subway together, with Yin Guo being playful and introducing themselves to Lin Yi Yang.

When Lin Yi Yang returned to their dormitory, Jiang Yang was unexpectedly waiting downstairs. Lin Yi Yang had undergone significant changes due to their relationship with Yin Guo, even frequently checking WeChat. Jiang Yang specifically mentioned this change to Lin Yi Yang, but Lin Yi Yang didn't say much. Jiang Yang understood and left after leaving a contact method for Lin Yi Yang.