Leo at 15 degrees signifies brute and chaotic energy, which can indeed attract challenging situations or 'hard luck.' Jupiter tempers this energy to some extent, but not entirely on its own. This means you need to do your part in mitigating the harshness of the energies. This is done through meditation and AoP - especially Yoga the Eight-Fold Path. It is very important to keep your energies at high levels, which is strongly favored by Jupiter.
In the 7th house of relationships, this placement can attract relationships where exploitation or domination might occur from both sides, emphasizing the importance of being mindful to prevent such dynamics. Over-expectation or experiencing injustice from others is possible but not guaranteed. While fostering passionate relationships, it cautions against over-optimism and potential conflicts arising from overly dramatic interactions.
Moreover, health concerns such as blood sugar irregularities or liver issues could arise due to this placement. Remember, a healthy lifestyle with regular exercise, sufficient sleep, and stress management (meditation for an example) in addition to a balanced diet, contributes to overall well-being and helps in preventing health issues related to blood sugar and liver function. Correctly aligning your chakras and emphasizing positive, protective energies through workings with specific affirmations is also advised.
Despite the challenges, this placement is not all negative. Jupiter in Leo also signifies a charismatic individual with strong leadership abilities. Much help can come from others. While there are positive aspects to this placement, it's crucial to consider the entirety of your chart to fully understand the potential outcomes.