Bitter Cold Apocalypse: I'll Settle Things with Everyone Using My AK

Apocalypse + System + Multiple Heroines + The Survival of Human Civilization + Special Abilities After the sun is attacked by an unknown force, it suddenly goes out, plunging the entire world into darkness. (Some mysterious blue fragments fall onto Blue Star.) More than ten days later, the sun shines again, but it has turned a cold blue and no longer gives off any heat. Wang Jiang awakens the Endless Vitality System. Sleep with girls who score highly in school to unlock supplies. When a woman becomes pregnant, giving birth grants the power of vitality. The protagonist’s abilities come from enhancements provided by the System. He doesn’t need to cultivate, and his powers are mainly physical: an enormous body, incredible strength, and exceptionally high defense. After four enhancements, he can sense Blue Star’s gravity, resist it, and begin to fly. Later, he can use gravity for other things as well. The others are ability users who gain ice powers after absorbing mysterious blue crystals.