Ullu is an Indian online streaming platform that specializes in adult content. The platform offers a range of web series and short films that are aimed at mature audiences. Here are some of the popular Ullu web series and their details:

Charmsukh: This anthology series features different stories with a common theme of erotica. The series has several seasons, and each episode explores a different aspect of sexual desire and relationships.

Riti Riwaj: This series explores the customs and traditions of different regions in India and how they impact relationships and sexuality. The series has several seasons and features different stories with a common theme of cultural taboos.

Palang Tod: This series explores the theme of infidelity and how it impacts relationships. The series has several seasons and features different stories with a common theme of sexual exploration and temptation.

Halala: This series explores the controversial practice of 'halala' in Islamic culture, where a divorced woman can remarry her ex-husband only after marrying and divorcing another man. The series follows the story of a woman who is forced to undergo the practice of halala and the impact it has on her relationships.

Kavita Bhabhi: This series follows the story of a woman who becomes a sex therapist and helps couples explore their sexuality. The series explores different aspects of sexual desire and relationships and features several explicit scenes.

Size Matters: This series explores the theme of body image and how it impacts relationships. The series follows the story of a man who is insecure about his size and how it affects his love life. The series has several seasons and features different stories with a common theme of body positivity.

It is important to note that Ullu web series are intended for mature audiences and feature explicit content. Viewers are advised to exercise discretion and watch these series at their own discretion.