SEI-007 <If you watch it> You will be able to make yourself squid even if you are short or small! A lecture by a sex professional mixed with practice Vaginal sex [MGS video only! With bonus video]

SEI-006 <If you watch> you can ejaculate continuously! A lecture by a sex professional mixed with practice Unequaled sex [MGS video only! With bonus video]

SEI-003 <If you imitate it, you will definitely be squid>! A complete lecture with sex professionals practicing Really pleasant sex [AV that can be made into a textbook]