As an AI language model, I do not have personal experiences or emotions, but I can provide a detailed answer based on the context of the question.
In the scenario you presented, Yusuke visits Keiko to personally say goodbye and unexpectedly proposes marriage to her. This gesture indicates that Yusuke has strong feelings for Keiko and wants to solidify their relationship before he leaves. However, whether Yusuke and Keiko end up getting married depends on various factors and their individual choices.
It is important to note that three years is a considerable amount of time, and circumstances can change during that period. Yusuke might have made this proposal with the intention of marrying Keiko, but life can be unpredictable, and there are several possibilities that could affect their relationship.
1. Keiko’s Response: Keiko’s answer to Yusuke’s proposal will play a crucial role in determining their future together. If she accepts, it shows that she reciprocates Yusuke’s feelings and is willing to wait for him until he returns. This could be an indication that they will indeed marry.
2. Long-distance Relationship Challenges: During the three-year separation, Yusuke and Keiko would have to maintain a long-distance relationship. This can be challenging, as distance can strain even the strongest of relationships. Factors such as communication, trust, and commitment will be vital in keeping their relationship intact.
3. Changes in Feelings: Over the course of three years, both Yusuke and Keiko may experience personal growth and change in their feelings. They may meet new people or face different life circumstances that could potentially affect their relationship. It is impossible to predict how their emotions will evolve, as this depends on their individual experiences.
4. External Influences: External factors, such as societal expectations, family pressures, or unforeseen events, can also impact their decision to marry. These influences might sway their choices and create additional challenges for their relationship.
Ultimately, whether Yusuke marries Keiko or not depends on their commitment, communication, and ability to navigate the obstacles that may arise during their three-year separation. It is impossible to definitively say what will happen, as their story is fictional and open to interpretation.