This two-part OVA is a series of shorts in relation to the School Rumble series. This OVA fills in gaps with new content between episodes from beginning to nearly the end. 
Episodes: 
1) Smile, Please! Mammoth, Yum! May I Fall in Love? 
Yoshidayama continues his climb to the top of the bad boy rankings, Imadori tries to touch a tomboy, and Harima tries his hand at prehistoric heroism! Back to the more recent past, a moment in the dark sheds light on an assistant’s clandestine crush.
 

2) New-Term Excitement! To Be Near You Scramble! The Naked Truth! 

Yakumo befriends a foreigner - in between her clairvoyant activities and frequent cat naps. The Class 2-C seating arrangements put Tenma in a tizzy over sitting next to her heart throb, but a certain bad boy is stressing over sitting next to her! 
(Source: Anime News Network, Crunchyroll)